Home / 123,678,138.40-185,517,207.60-72,533,831.20

Finding the Fourth Proportional to 123,678,138.40, 185,517,207.60 and 72,533,831.20

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Solution

The fourth proportional to 123,678,138.40, 185,517,207.60 and 72,533,831.20 is: 108,800,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,678,138.40 : 185,517,207.60 = 72,533,831.20 : x
  2. Step 2: Convert to fraction form
    123,678,138.40/185,517,207.60 = 72,533,831.20/x
  3. Step 3: Cross multiply
    123,678,138.40x = 185,517,207.60 × 72,533,831.20
  4. Step 4: Simplify right side
    123,678,138.40x = 13,456,273,820,753,758
  5. Step 5: Solve for x
    x = 13,456,273,820,753,758/123,678,138.40
  6. Step 6: Final answer
    x = 108,800,746.80

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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.