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Finding the Fourth Proportional to 135,079.93, 186,400.98 and 74,650

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Solution

The fourth proportional to 135,079.93, 186,400.98 and 74,650 is: 103,011.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,079.93 : 186,400.98 = 74,650 : x
  2. Step 2: Convert to fraction form
    135,079.93/186,400.98 = 74,650/x
  3. Step 3: Cross multiply
    135,079.93x = 186,400.98 × 74,650
  4. Step 4: Simplify right side
    135,079.93x = 13,914,833,157
  5. Step 5: Solve for x
    x = 13,914,833,157/135,079.93
  6. Step 6: Final answer
    x = 103,011.85

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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.