Home / 138,944.19-191,740.46-78,513.53

Finding the Fourth Proportional to 138,944.19, 191,740.46 and 78,513.53

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Solution

The fourth proportional to 138,944.19, 191,740.46 and 78,513.53 is: 108,347.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,944.19 : 191,740.46 = 78,513.53 : x
  2. Step 2: Convert to fraction form
    138,944.19/191,740.46 = 78,513.53/x
  3. Step 3: Cross multiply
    138,944.19x = 191,740.46 × 78,513.53
  4. Step 4: Simplify right side
    138,944.19x = 15,054,220,020.61
  5. Step 5: Solve for x
    x = 15,054,220,020.61/138,944.19
  6. Step 6: Final answer
    x = 108,347.25

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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.