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Finding the Fourth Proportional to 58,543.40, 80,789.80 and 31,685.89

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Solution

The fourth proportional to 58,543.40, 80,789.80 and 31,685.89 is: 43,726.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,543.40 : 80,789.80 = 31,685.89 : x
  2. Step 2: Convert to fraction form
    58,543.40/80,789.80 = 31,685.89/x
  3. Step 3: Cross multiply
    58,543.40x = 80,789.80 × 31,685.89
  4. Step 4: Simplify right side
    58,543.40x = 2,559,896,715.92
  5. Step 5: Solve for x
    x = 2,559,896,715.92/58,543.40
  6. Step 6: Final answer
    x = 43,726.48

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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.