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Finding the Fourth Proportional to 138,671.60, 207,818.94 and 58,643.06

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Solution

The fourth proportional to 138,671.60, 207,818.94 and 58,643.06 is: 87,884.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,671.60 : 207,818.94 = 58,643.06 : x
  2. Step 2: Convert to fraction form
    138,671.60/207,818.94 = 58,643.06/x
  3. Step 3: Cross multiply
    138,671.60x = 207,818.94 × 58,643.06
  4. Step 4: Simplify right side
    138,671.60x = 12,187,138,567.56
  5. Step 5: Solve for x
    x = 12,187,138,567.56/138,671.60
  6. Step 6: Final answer
    x = 87,884.89

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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.