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Finding the Fourth Proportional to 58,279.64, 87,437.90 and 20,838.88

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Solution

The fourth proportional to 58,279.64, 87,437.90 and 20,838.88 is: 31,264.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,279.64 : 87,437.90 = 20,838.88 : x
  2. Step 2: Convert to fraction form
    58,279.64/87,437.90 = 20,838.88/x
  3. Step 3: Cross multiply
    58,279.64x = 87,437.90 × 20,838.88
  4. Step 4: Simplify right side
    58,279.64x = 1,822,107,905.55
  5. Step 5: Solve for x
    x = 1,822,107,905.55/58,279.64
  6. Step 6: Final answer
    x = 31,264.91

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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.