Home / 86,345.10-129,375.09-39,494.70

Finding the Fourth Proportional to 86,345.10, 129,375.09 and 39,494.70

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Solution

The fourth proportional to 86,345.10, 129,375.09 and 39,494.70 is: 59,176.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,345.10 : 129,375.09 = 39,494.70 : x
  2. Step 2: Convert to fraction form
    86,345.10/129,375.09 = 39,494.70/x
  3. Step 3: Cross multiply
    86,345.10x = 129,375.09 × 39,494.70
  4. Step 4: Simplify right side
    86,345.10x = 5,109,630,367.02
  5. Step 5: Solve for x
    x = 5,109,630,367.02/86,345.10
  6. Step 6: Final answer
    x = 59,176.84

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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.