Home / 90,971,251.80-136,456,877.70-81,145,498.20

Finding the Fourth Proportional to 90,971,251.80, 136,456,877.70 and 81,145,498.20

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Solution

The fourth proportional to 90,971,251.80, 136,456,877.70 and 81,145,498.20 is: 121,718,247.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,971,251.80 : 136,456,877.70 = 81,145,498.20 : x
  2. Step 2: Convert to fraction form
    90,971,251.80/136,456,877.70 = 81,145,498.20/x
  3. Step 3: Cross multiply
    90,971,251.80x = 136,456,877.70 × 81,145,498.20
  4. Step 4: Simplify right side
    90,971,251.80x = 11,072,861,323,782,970
  5. Step 5: Solve for x
    x = 11,072,861,323,782,970/90,971,251.80
  6. Step 6: Final answer
    x = 121,718,247.30

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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.