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Finding the Fourth Proportional to 72,545.72, 100,114.11 and 39,842.82

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Solution

The fourth proportional to 72,545.72, 100,114.11 and 39,842.82 is: 54,983.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,545.72 : 100,114.11 = 39,842.82 : x
  2. Step 2: Convert to fraction form
    72,545.72/100,114.11 = 39,842.82/x
  3. Step 3: Cross multiply
    72,545.72x = 100,114.11 × 39,842.82
  4. Step 4: Simplify right side
    72,545.72x = 3,988,828,464.19
  5. Step 5: Solve for x
    x = 3,988,828,464.19/72,545.72
  6. Step 6: Final answer
    x = 54,983.65

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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.