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Finding the Fourth Proportional to 61,545.28, 84,899.91 and 42,392.11

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Solution

The fourth proportional to 61,545.28, 84,899.91 and 42,392.11 is: 58,478.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,545.28 : 84,899.91 = 42,392.11 : x
  2. Step 2: Convert to fraction form
    61,545.28/84,899.91 = 42,392.11/x
  3. Step 3: Cross multiply
    61,545.28x = 84,899.91 × 42,392.11
  4. Step 4: Simplify right side
    61,545.28x = 3,599,086,323.71
  5. Step 5: Solve for x
    x = 3,599,086,323.71/61,545.28
  6. Step 6: Final answer
    x = 58,478.67

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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.