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Finding the Fourth Proportional to 136,023.74, 187,659 and 78,652.52

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Solution

The fourth proportional to 136,023.74, 187,659 and 78,652.52 is: 108,509.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,023.74 : 187,659 = 78,652.52 : x
  2. Step 2: Convert to fraction form
    136,023.74/187,659 = 78,652.52/x
  3. Step 3: Cross multiply
    136,023.74x = 187,659 × 78,652.52
  4. Step 4: Simplify right side
    136,023.74x = 14,759,853,250.68
  5. Step 5: Solve for x
    x = 14,759,853,250.68/136,023.74
  6. Step 6: Final answer
    x = 108,509.39

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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.