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Finding the Fourth Proportional to 68,009.40, 102,023.70 and 21,257.40

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Solution

The fourth proportional to 68,009.40, 102,023.70 and 21,257.40 is: 31,889.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,009.40 : 102,023.70 = 21,257.40 : x
  2. Step 2: Convert to fraction form
    68,009.40/102,023.70 = 21,257.40/x
  3. Step 3: Cross multiply
    68,009.40x = 102,023.70 × 21,257.40
  4. Step 4: Simplify right side
    68,009.40x = 2,168,758,600.38
  5. Step 5: Solve for x
    x = 2,168,758,600.38/68,009.40
  6. Step 6: Final answer
    x = 31,889.10

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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.