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Finding the Fourth Proportional to 86,855.86, 130,250.58 and 47,391.88

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Solution

The fourth proportional to 86,855.86, 130,250.58 and 47,391.88 is: 71,069.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,855.86 : 130,250.58 = 47,391.88 : x
  2. Step 2: Convert to fraction form
    86,855.86/130,250.58 = 47,391.88/x
  3. Step 3: Cross multiply
    86,855.86x = 130,250.58 × 47,391.88
  4. Step 4: Simplify right side
    86,855.86x = 6,172,819,857.29
  5. Step 5: Solve for x
    x = 6,172,819,857.29/86,855.86
  6. Step 6: Final answer
    x = 71,069.70

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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.