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Finding the Fourth Proportional to 100,397.92, 138,435.68 and 64,050.88

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Solution

The fourth proportional to 100,397.92, 138,435.68 and 64,050.88 is: 88,317.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,397.92 : 138,435.68 = 64,050.88 : x
  2. Step 2: Convert to fraction form
    100,397.92/138,435.68 = 64,050.88/x
  3. Step 3: Cross multiply
    100,397.92x = 138,435.68 × 64,050.88
  4. Step 4: Simplify right side
    100,397.92x = 8,866,927,127.40
  5. Step 5: Solve for x
    x = 8,866,927,127.40/100,397.92
  6. Step 6: Final answer
    x = 88,317.84

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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.