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Finding the Fourth Proportional to 266,439.04, 399,649.32 and 66,761.12

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Solution

The fourth proportional to 266,439.04, 399,649.32 and 66,761.12 is: 100,139.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,439.04 : 399,649.32 = 66,761.12 : x
  2. Step 2: Convert to fraction form
    266,439.04/399,649.32 = 66,761.12/x
  3. Step 3: Cross multiply
    266,439.04x = 399,649.32 × 66,761.12
  4. Step 4: Simplify right side
    266,439.04x = 26,681,036,210.44
  5. Step 5: Solve for x
    x = 26,681,036,210.44/266,439.04
  6. Step 6: Final answer
    x = 100,139.36

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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.