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Finding the Fourth Proportional to 71,905.01, 107,857.51 and 21,985.10

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Solution

The fourth proportional to 71,905.01, 107,857.51 and 21,985.10 is: 32,977.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,905.01 : 107,857.51 = 21,985.10 : x
  2. Step 2: Convert to fraction form
    71,905.01/107,857.51 = 21,985.10/x
  3. Step 3: Cross multiply
    71,905.01x = 107,857.51 × 21,985.10
  4. Step 4: Simplify right side
    71,905.01x = 2,371,258,357.78
  5. Step 5: Solve for x
    x = 2,371,258,357.78/71,905.01
  6. Step 6: Final answer
    x = 32,977.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.