Home / 138,508.04-191,143.33-78,081.64

Finding the Fourth Proportional to 138,508.04, 191,143.33 and 78,081.64

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Solution

The fourth proportional to 138,508.04, 191,143.33 and 78,081.64 is: 107,753.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,508.04 : 191,143.33 = 78,081.64 : x
  2. Step 2: Convert to fraction form
    138,508.04/191,143.33 = 78,081.64/x
  3. Step 3: Cross multiply
    138,508.04x = 191,143.33 × 78,081.64
  4. Step 4: Simplify right side
    138,508.04x = 14,924,784,008.40
  5. Step 5: Solve for x
    x = 14,924,784,008.40/138,508.04
  6. Step 6: Final answer
    x = 107,753.92

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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.