Home / 138,610.07-191,281.65-78,180.53

Finding the Fourth Proportional to 138,610.07, 191,281.65 and 78,180.53

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Solution

The fourth proportional to 138,610.07, 191,281.65 and 78,180.53 is: 107,888.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,610.07 : 191,281.65 = 78,180.53 : x
  2. Step 2: Convert to fraction form
    138,610.07/191,281.65 = 78,180.53/x
  3. Step 3: Cross multiply
    138,610.07x = 191,281.65 × 78,180.53
  4. Step 4: Simplify right side
    138,610.07x = 14,954,500,776.27
  5. Step 5: Solve for x
    x = 14,954,500,776.27/138,610.07
  6. Step 6: Final answer
    x = 107,888.99

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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.