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Finding the Fourth Proportional to 72,666.46, 100,280.90 and 39,962.26

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Solution

The fourth proportional to 72,666.46, 100,280.90 and 39,962.26 is: 55,148.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,666.46 : 100,280.90 = 39,962.26 : x
  2. Step 2: Convert to fraction form
    72,666.46/100,280.90 = 39,962.26/x
  3. Step 3: Cross multiply
    72,666.46x = 100,280.90 × 39,962.26
  4. Step 4: Simplify right side
    72,666.46x = 4,007,451,398.83
  5. Step 5: Solve for x
    x = 4,007,451,398.83/72,666.46
  6. Step 6: Final answer
    x = 55,148.57

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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.