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Finding the Fourth Proportional to 58,139.66, 87,263.96 and 28,578.71

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Solution

The fourth proportional to 58,139.66, 87,263.96 and 28,578.71 is: 42,894.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,139.66 : 87,263.96 = 28,578.71 : x
  2. Step 2: Convert to fraction form
    58,139.66/87,263.96 = 28,578.71/x
  3. Step 3: Cross multiply
    58,139.66x = 87,263.96 × 28,578.71
  4. Step 4: Simplify right side
    58,139.66x = 2,493,890,827.08
  5. Step 5: Solve for x
    x = 2,493,890,827.08/58,139.66
  6. Step 6: Final answer
    x = 42,894.83

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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.