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Finding the Fourth Proportional to 138,658.64, 208,009.08 and 58,696.52

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Solution

The fourth proportional to 138,658.64, 208,009.08 and 58,696.52 is: 88,053.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,658.64 : 208,009.08 = 58,696.52 : x
  2. Step 2: Convert to fraction form
    138,658.64/208,009.08 = 58,696.52/x
  3. Step 3: Cross multiply
    138,658.64x = 208,009.08 × 58,696.52
  4. Step 4: Simplify right side
    138,658.64x = 12,209,408,084.36
  5. Step 5: Solve for x
    x = 12,209,408,084.36/138,658.64
  6. Step 6: Final answer
    x = 88,053.72

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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.