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Finding the Fourth Proportional to 72,800.71, 100,449.47 and 42,580.13

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Solution

The fourth proportional to 72,800.71, 100,449.47 and 42,580.13 is: 58,751.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,800.71 : 100,449.47 = 42,580.13 : x
  2. Step 2: Convert to fraction form
    72,800.71/100,449.47 = 42,580.13/x
  3. Step 3: Cross multiply
    72,800.71x = 100,449.47 × 42,580.13
  4. Step 4: Simplify right side
    72,800.71x = 4,277,150,988.78
  5. Step 5: Solve for x
    x = 4,277,150,988.78/72,800.71
  6. Step 6: Final answer
    x = 58,751.51

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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.