Home / 138,666.03-191,342.66-78,233.15

Finding the Fourth Proportional to 138,666.03, 191,342.66 and 78,233.15

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Solution

The fourth proportional to 138,666.03, 191,342.66 and 78,233.15 is: 107,952.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,666.03 : 191,342.66 = 78,233.15 : x
  2. Step 2: Convert to fraction form
    138,666.03/191,342.66 = 78,233.15/x
  3. Step 3: Cross multiply
    138,666.03x = 191,342.66 × 78,233.15
  4. Step 4: Simplify right side
    138,666.03x = 14,969,338,445.03
  5. Step 5: Solve for x
    x = 14,969,338,445.03/138,666.03
  6. Step 6: Final answer
    x = 107,952.45

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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.