Home / 86,374.32-129,359.88-66,495.12

Finding the Fourth Proportional to 86,374.32, 129,359.88 and 66,495.12

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Solution

The fourth proportional to 86,374.32, 129,359.88 and 66,495.12 is: 99,587.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,374.32 : 129,359.88 = 66,495.12 : x
  2. Step 2: Convert to fraction form
    86,374.32/129,359.88 = 66,495.12/x
  3. Step 3: Cross multiply
    86,374.32x = 129,359.88 × 66,495.12
  4. Step 4: Simplify right side
    86,374.32x = 8,601,800,743.79
  5. Step 5: Solve for x
    x = 8,601,800,743.79/86,374.32
  6. Step 6: Final answer
    x = 99,587.48

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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.