Home / 121,139.20-181,490.10-98,831.80

Finding the Fourth Proportional to 121,139.20, 181,490.10 and 98,831.80

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Solution

The fourth proportional to 121,139.20, 181,490.10 and 98,831.80 is: 148,069.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,139.20 : 181,490.10 = 98,831.80 : x
  2. Step 2: Convert to fraction form
    121,139.20/181,490.10 = 98,831.80/x
  3. Step 3: Cross multiply
    121,139.20x = 181,490.10 × 98,831.80
  4. Step 4: Simplify right side
    121,139.20x = 17,936,993,265.18
  5. Step 5: Solve for x
    x = 17,936,993,265.18/121,139.20
  6. Step 6: Final answer
    x = 148,069.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.