Home / 129,909,715.20-179,275,406.40-71,962,963.20

Finding the Fourth Proportional to 129,909,715.20, 179,275,406.40 and 71,962,963.20

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Solution

The fourth proportional to 129,909,715.20, 179,275,406.40 and 71,962,963.20 is: 99,308,888.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,909,715.20 : 179,275,406.40 = 71,962,963.20 : x
  2. Step 2: Convert to fraction form
    129,909,715.20/179,275,406.40 = 71,962,963.20/x
  3. Step 3: Cross multiply
    129,909,715.20x = 179,275,406.40 × 71,962,963.20
  4. Step 4: Simplify right side
    129,909,715.20x = 12,901,189,473,428,246
  5. Step 5: Solve for x
    x = 12,901,189,473,428,246/129,909,715.20
  6. Step 6: Final answer
    x = 99,308,888.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.