Home / 138,875.23-191,659.61-78,456.96

Finding the Fourth Proportional to 138,875.23, 191,659.61 and 78,456.96

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Solution

The fourth proportional to 138,875.23, 191,659.61 and 78,456.96 is: 108,277.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,875.23 : 191,659.61 = 78,456.96 : x
  2. Step 2: Convert to fraction form
    138,875.23/191,659.61 = 78,456.96/x
  3. Step 3: Cross multiply
    138,875.23x = 191,659.61 × 78,456.96
  4. Step 4: Simplify right side
    138,875.23x = 15,037,030,551.53
  5. Step 5: Solve for x
    x = 15,037,030,551.53/138,875.23
  6. Step 6: Final answer
    x = 108,277.27

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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.