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Finding the Fourth Proportional to 137,319.70, 205,979.55 and 84,558.10

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Solution

The fourth proportional to 137,319.70, 205,979.55 and 84,558.10 is: 126,837.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,319.70 : 205,979.55 = 84,558.10 : x
  2. Step 2: Convert to fraction form
    137,319.70/205,979.55 = 84,558.10/x
  3. Step 3: Cross multiply
    137,319.70x = 205,979.55 × 84,558.10
  4. Step 4: Simplify right side
    137,319.70x = 17,417,239,386.86
  5. Step 5: Solve for x
    x = 17,417,239,386.86/137,319.70
  6. Step 6: Final answer
    x = 126,837.15

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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.