Home / 86,581.70-129,763.20-42,112.70

Finding the Fourth Proportional to 86,581.70, 129,763.20 and 42,112.70

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Solution

The fourth proportional to 86,581.70, 129,763.20 and 42,112.70 is: 63,115.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,581.70 : 129,763.20 = 42,112.70 : x
  2. Step 2: Convert to fraction form
    86,581.70/129,763.20 = 42,112.70/x
  3. Step 3: Cross multiply
    86,581.70x = 129,763.20 × 42,112.70
  4. Step 4: Simplify right side
    86,581.70x = 5,464,678,712.64
  5. Step 5: Solve for x
    x = 5,464,678,712.64/86,581.70
  6. Step 6: Final answer
    x = 63,115.86

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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.