Home / 86,690.12-129,985.92-51,654.38

Finding the Fourth Proportional to 86,690.12, 129,985.92 and 51,654.38

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Solution

The fourth proportional to 86,690.12, 129,985.92 and 51,654.38 is: 77,452.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,690.12 : 129,985.92 = 51,654.38 : x
  2. Step 2: Convert to fraction form
    86,690.12/129,985.92 = 51,654.38/x
  3. Step 3: Cross multiply
    86,690.12x = 129,985.92 × 51,654.38
  4. Step 4: Simplify right side
    86,690.12x = 6,714,341,456.40
  5. Step 5: Solve for x
    x = 6,714,341,456.40/86,690.12
  6. Step 6: Final answer
    x = 77,452.22

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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.