Home / 87,209,639.20-130,814,458.80-80,640,474.40

Finding the Fourth Proportional to 87,209,639.20, 130,814,458.80 and 80,640,474.40

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Solution

The fourth proportional to 87,209,639.20, 130,814,458.80 and 80,640,474.40 is: 120,960,711.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,209,639.20 : 130,814,458.80 = 80,640,474.40 : x
  2. Step 2: Convert to fraction form
    87,209,639.20/130,814,458.80 = 80,640,474.40/x
  3. Step 3: Cross multiply
    87,209,639.20x = 130,814,458.80 × 80,640,474.40
  4. Step 4: Simplify right side
    87,209,639.20x = 10,548,940,016,011,256
  5. Step 5: Solve for x
    x = 10,548,940,016,011,256/87,209,639.20
  6. Step 6: Final answer
    x = 120,960,711.60

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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.