Home / 91,218.06-136,734-51,691.68

Finding the Fourth Proportional to 91,218.06, 136,734 and 51,691.68

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Solution

The fourth proportional to 91,218.06, 136,734 and 51,691.68 is: 77,484.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,218.06 : 136,734 = 51,691.68 : x
  2. Step 2: Convert to fraction form
    91,218.06/136,734 = 51,691.68/x
  3. Step 3: Cross multiply
    91,218.06x = 136,734 × 51,691.68
  4. Step 4: Simplify right side
    91,218.06x = 7,068,010,173.12
  5. Step 5: Solve for x
    x = 7,068,010,173.12/91,218.06
  6. Step 6: Final answer
    x = 77,484.77

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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.