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Finding the Fourth Proportional to 86,478.59, 129,731.27 and 36,558.87

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Solution

The fourth proportional to 86,478.59, 129,731.27 and 36,558.87 is: 54,843.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,478.59 : 129,731.27 = 36,558.87 : x
  2. Step 2: Convert to fraction form
    86,478.59/129,731.27 = 36,558.87/x
  3. Step 3: Cross multiply
    86,478.59x = 129,731.27 × 36,558.87
  4. Step 4: Simplify right side
    86,478.59x = 4,742,828,452.07
  5. Step 5: Solve for x
    x = 4,742,828,452.07/86,478.59
  6. Step 6: Final answer
    x = 54,843.96

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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.