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Finding the Fourth Proportional to 72,655.43, 100,276.53 and 42,440.66

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Solution

The fourth proportional to 72,655.43, 100,276.53 and 42,440.66 is: 58,575.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,655.43 : 100,276.53 = 42,440.66 : x
  2. Step 2: Convert to fraction form
    72,655.43/100,276.53 = 42,440.66/x
  3. Step 3: Cross multiply
    72,655.43x = 100,276.53 × 42,440.66
  4. Step 4: Simplify right side
    72,655.43x = 4,255,802,069.94
  5. Step 5: Solve for x
    x = 4,255,802,069.94/72,655.43
  6. Step 6: Final answer
    x = 58,575.14

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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.