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Finding the Fourth Proportional to 86,487.70, 129,731.56 and 36,554.26

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Solution

The fourth proportional to 86,487.70, 129,731.56 and 36,554.26 is: 54,831.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,487.70 : 129,731.56 = 36,554.26 : x
  2. Step 2: Convert to fraction form
    86,487.70/129,731.56 = 36,554.26/x
  3. Step 3: Cross multiply
    86,487.70x = 129,731.56 × 36,554.26
  4. Step 4: Simplify right side
    86,487.70x = 4,742,241,174.45
  5. Step 5: Solve for x
    x = 4,742,241,174.45/86,487.70
  6. Step 6: Final answer
    x = 54,831.39

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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.