Home / 138,560.48-191,197.22-78,127.53

Finding the Fourth Proportional to 138,560.48, 191,197.22 and 78,127.53

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Solution

The fourth proportional to 138,560.48, 191,197.22 and 78,127.53 is: 107,806.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,560.48 : 191,197.22 = 78,127.53 : x
  2. Step 2: Convert to fraction form
    138,560.48/191,197.22 = 78,127.53/x
  3. Step 3: Cross multiply
    138,560.48x = 191,197.22 × 78,127.53
  4. Step 4: Simplify right side
    138,560.48x = 14,937,765,194.84
  5. Step 5: Solve for x
    x = 14,937,765,194.84/138,560.48
  6. Step 6: Final answer
    x = 107,806.82

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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.