Home / 138,968.90-191,777.18-75,306.70

Finding the Fourth Proportional to 138,968.90, 191,777.18 and 75,306.70

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Solution

The fourth proportional to 138,968.90, 191,777.18 and 75,306.70 is: 103,923.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,968.90 : 191,777.18 = 75,306.70 : x
  2. Step 2: Convert to fraction form
    138,968.90/191,777.18 = 75,306.70/x
  3. Step 3: Cross multiply
    138,968.90x = 191,777.18 × 75,306.70
  4. Step 4: Simplify right side
    138,968.90x = 14,442,106,561.11
  5. Step 5: Solve for x
    x = 14,442,106,561.11/138,968.90
  6. Step 6: Final answer
    x = 103,923.30

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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.