Home / 138,875.30-191,663.50-78,449.84

Finding the Fourth Proportional to 138,875.30, 191,663.50 and 78,449.84

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Solution

The fourth proportional to 138,875.30, 191,663.50 and 78,449.84 is: 108,269.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,875.30 : 191,663.50 = 78,449.84 : x
  2. Step 2: Convert to fraction form
    138,875.30/191,663.50 = 78,449.84/x
  3. Step 3: Cross multiply
    138,875.30x = 191,663.50 × 78,449.84
  4. Step 4: Simplify right side
    138,875.30x = 15,035,969,950.52
  5. Step 5: Solve for x
    x = 15,035,969,950.52/138,875.30
  6. Step 6: Final answer
    x = 108,269.58

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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.