Home / 138,699.53-191,402.19-78,268.62

Finding the Fourth Proportional to 138,699.53, 191,402.19 and 78,268.62

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Solution

The fourth proportional to 138,699.53, 191,402.19 and 78,268.62 is: 108,008.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,699.53 : 191,402.19 = 78,268.62 : x
  2. Step 2: Convert to fraction form
    138,699.53/191,402.19 = 78,268.62/x
  3. Step 3: Cross multiply
    138,699.53x = 191,402.19 × 78,268.62
  4. Step 4: Simplify right side
    138,699.53x = 14,980,785,276.28
  5. Step 5: Solve for x
    x = 14,980,785,276.28/138,699.53
  6. Step 6: Final answer
    x = 108,008.92

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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.