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Finding the Fourth Proportional to 86,373.54, 129,388.59 and 67,565.75

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Solution

The fourth proportional to 86,373.54, 129,388.59 and 67,565.75 is: 101,214.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,373.54 : 129,388.59 = 67,565.75 : x
  2. Step 2: Convert to fraction form
    86,373.54/129,388.59 = 67,565.75/x
  3. Step 3: Cross multiply
    86,373.54x = 129,388.59 × 67,565.75
  4. Step 4: Simplify right side
    86,373.54x = 8,742,236,477.85
  5. Step 5: Solve for x
    x = 8,742,236,477.85/86,373.54
  6. Step 6: Final answer
    x = 101,214.29

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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.