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Finding the Fourth Proportional to 123,397.76, 170,279.22 and 69,688.08

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Solution

The fourth proportional to 123,397.76, 170,279.22 and 69,688.08 is: 96,164.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,397.76 : 170,279.22 = 69,688.08 : x
  2. Step 2: Convert to fraction form
    123,397.76/170,279.22 = 69,688.08/x
  3. Step 3: Cross multiply
    123,397.76x = 170,279.22 × 69,688.08
  4. Step 4: Simplify right side
    123,397.76x = 11,866,431,905.70
  5. Step 5: Solve for x
    x = 11,866,431,905.70/123,397.76
  6. Step 6: Final answer
    x = 96,164.08

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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.