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Finding the Fourth Proportional to 98,681.52, 136,171.98 and 55,658.64

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Solution

The fourth proportional to 98,681.52, 136,171.98 and 55,658.64 is: 76,804.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,681.52 : 136,171.98 = 55,658.64 : x
  2. Step 2: Convert to fraction form
    98,681.52/136,171.98 = 55,658.64/x
  3. Step 3: Cross multiply
    98,681.52x = 136,171.98 × 55,658.64
  4. Step 4: Simplify right side
    98,681.52x = 7,579,147,212.91
  5. Step 5: Solve for x
    x = 7,579,147,212.91/98,681.52
  6. Step 6: Final answer
    x = 76,804.12

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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.