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Finding the Fourth Proportional to 72,520.29, 108,780.29 and 40,916.00

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Solution

The fourth proportional to 72,520.29, 108,780.29 and 40,916.00 is: 61,373.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,520.29 : 108,780.29 = 40,916.00 : x
  2. Step 2: Convert to fraction form
    72,520.29/108,780.29 = 40,916.00/x
  3. Step 3: Cross multiply
    72,520.29x = 108,780.29 × 40,916.00
  4. Step 4: Simplify right side
    72,520.29x = 4,450,854,413.01
  5. Step 5: Solve for x
    x = 4,450,854,413.01/72,520.29
  6. Step 6: Final answer
    x = 61,373.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.