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Finding the Fourth Proportional to 58,118.78, 87,166.68 and 15,987.99

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Solution

The fourth proportional to 58,118.78, 87,166.68 and 15,987.99 is: 23,978.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,118.78 : 87,166.68 = 15,987.99 : x
  2. Step 2: Convert to fraction form
    58,118.78/87,166.68 = 15,987.99/x
  3. Step 3: Cross multiply
    58,118.78x = 87,166.68 × 15,987.99
  4. Step 4: Simplify right side
    58,118.78x = 1,393,619,681.30
  5. Step 5: Solve for x
    x = 1,393,619,681.30/58,118.78
  6. Step 6: Final answer
    x = 23,978.82

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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.