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Finding the Fourth Proportional to 86,358.17, 129,554.72 and 36,438.39

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Solution

The fourth proportional to 86,358.17, 129,554.72 and 36,438.39 is: 54,664.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,358.17 : 129,554.72 = 36,438.39 : x
  2. Step 2: Convert to fraction form
    86,358.17/129,554.72 = 36,438.39/x
  3. Step 3: Cross multiply
    86,358.17x = 129,554.72 × 36,438.39
  4. Step 4: Simplify right side
    86,358.17x = 4,720,765,231.51
  5. Step 5: Solve for x
    x = 4,720,765,231.51/86,358.17
  6. Step 6: Final answer
    x = 54,664.96

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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.