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Finding the Fourth Proportional to 153,615.12, 212,028.88 and 100,047.12

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Solution

The fourth proportional to 153,615.12, 212,028.88 and 100,047.12 is: 138,091.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,615.12 : 212,028.88 = 100,047.12 : x
  2. Step 2: Convert to fraction form
    153,615.12/212,028.88 = 100,047.12/x
  3. Step 3: Cross multiply
    153,615.12x = 212,028.88 × 100,047.12
  4. Step 4: Simplify right side
    153,615.12x = 21,212,878,800.83
  5. Step 5: Solve for x
    x = 21,212,878,800.83/153,615.12
  6. Step 6: Final answer
    x = 138,091.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.