Home / 83,431.16-115,151.02-65,245.86

Finding the Fourth Proportional to 83,431.16, 115,151.02 and 65,245.86

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Solution

The fourth proportional to 83,431.16, 115,151.02 and 65,245.86 is: 90,051.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,431.16 : 115,151.02 = 65,245.86 : x
  2. Step 2: Convert to fraction form
    83,431.16/115,151.02 = 65,245.86/x
  3. Step 3: Cross multiply
    83,431.16x = 115,151.02 × 65,245.86
  4. Step 4: Simplify right side
    83,431.16x = 7,513,127,329.78
  5. Step 5: Solve for x
    x = 7,513,127,329.78/83,431.16
  6. Step 6: Final answer
    x = 90,051.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.