Home / 86,538,289.28-129,807,740.57-20,959,471.04

Finding the Fourth Proportional to 86,538,289.28, 129,807,740.57 and 20,959,471.04

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Solution

The fourth proportional to 86,538,289.28, 129,807,740.57 and 20,959,471.04 is: 31,439,280.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,538,289.28 : 129,807,740.57 = 20,959,471.04 : x
  2. Step 2: Convert to fraction form
    86,538,289.28/129,807,740.57 = 20,959,471.04/x
  3. Step 3: Cross multiply
    86,538,289.28x = 129,807,740.57 × 20,959,471.04
  4. Step 4: Simplify right side
    86,538,289.28x = 2,720,701,578,490,912
  5. Step 5: Solve for x
    x = 2,720,701,578,490,912/86,538,289.28
  6. Step 6: Final answer
    x = 31,439,280.82

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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.