Home / 100,278,010.80-150,417,016.20-86,407,400.70

Finding the Fourth Proportional to 100,278,010.80, 150,417,016.20 and 86,407,400.70

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Solution

The fourth proportional to 100,278,010.80, 150,417,016.20 and 86,407,400.70 is: 129,611,101.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,278,010.80 : 150,417,016.20 = 86,407,400.70 : x
  2. Step 2: Convert to fraction form
    100,278,010.80/150,417,016.20 = 86,407,400.70/x
  3. Step 3: Cross multiply
    100,278,010.80x = 150,417,016.20 × 86,407,400.70
  4. Step 4: Simplify right side
    100,278,010.80x = 12,997,143,390,891,790
  5. Step 5: Solve for x
    x = 12,997,143,390,891,790/100,278,010.80
  6. Step 6: Final answer
    x = 129,611,101.05

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1.5x scale

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.