Home / 138,140.74-190,632.18-77,711.42

Finding the Fourth Proportional to 138,140.74, 190,632.18 and 77,711.42

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Solution

The fourth proportional to 138,140.74, 190,632.18 and 77,711.42 is: 107,240.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,140.74 : 190,632.18 = 77,711.42 : x
  2. Step 2: Convert to fraction form
    138,140.74/190,632.18 = 77,711.42/x
  3. Step 3: Cross multiply
    138,140.74x = 190,632.18 × 77,711.42
  4. Step 4: Simplify right side
    138,140.74x = 14,814,297,101.19
  5. Step 5: Solve for x
    x = 14,814,297,101.19/138,140.74
  6. Step 6: Final answer
    x = 107,240.61

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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.