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Finding the Fourth Proportional to 74,572.80, 102,913.92 and 50,726.40

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Solution

The fourth proportional to 74,572.80, 102,913.92 and 50,726.40 is: 70,004.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,572.80 : 102,913.92 = 50,726.40 : x
  2. Step 2: Convert to fraction form
    74,572.80/102,913.92 = 50,726.40/x
  3. Step 3: Cross multiply
    74,572.80x = 102,913.92 × 50,726.40
  4. Step 4: Simplify right side
    74,572.80x = 5,220,452,671.49
  5. Step 5: Solve for x
    x = 5,220,452,671.49/74,572.80
  6. Step 6: Final answer
    x = 70,004.78

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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.