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Finding the Fourth Proportional to 98,990.52, 136,607.85 and 53,668.38

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Solution

The fourth proportional to 98,990.52, 136,607.85 and 53,668.38 is: 74,062.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,990.52 : 136,607.85 = 53,668.38 : x
  2. Step 2: Convert to fraction form
    98,990.52/136,607.85 = 53,668.38/x
  3. Step 3: Cross multiply
    98,990.52x = 136,607.85 × 53,668.38
  4. Step 4: Simplify right side
    98,990.52x = 7,331,522,004.78
  5. Step 5: Solve for x
    x = 7,331,522,004.78/98,990.52
  6. Step 6: Final answer
    x = 74,062.87

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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.