Home / 138,695.19-191,400.92-78,266.55

Finding the Fourth Proportional to 138,695.19, 191,400.92 and 78,266.55

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Solution

The fourth proportional to 138,695.19, 191,400.92 and 78,266.55 is: 108,008.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,695.19 : 191,400.92 = 78,266.55 : x
  2. Step 2: Convert to fraction form
    138,695.19/191,400.92 = 78,266.55/x
  3. Step 3: Cross multiply
    138,695.19x = 191,400.92 × 78,266.55
  4. Step 4: Simplify right side
    138,695.19x = 14,980,290,735.40
  5. Step 5: Solve for x
    x = 14,980,290,735.40/138,695.19
  6. Step 6: Final answer
    x = 108,008.73

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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.