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Finding the Fourth Proportional to 72,761.49, 100,397.88 and 40,918.77

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Solution

The fourth proportional to 72,761.49, 100,397.88 and 40,918.77 is: 56,460.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,761.49 : 100,397.88 = 40,918.77 : x
  2. Step 2: Convert to fraction form
    72,761.49/100,397.88 = 40,918.77/x
  3. Step 3: Cross multiply
    72,761.49x = 100,397.88 × 40,918.77
  4. Step 4: Simplify right side
    72,761.49x = 4,108,157,760.21
  5. Step 5: Solve for x
    x = 4,108,157,760.21/72,761.49
  6. Step 6: Final answer
    x = 56,460.61

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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.