Home / 87,120,856.80-130,681,285.20-85,609,202.40

Finding the Fourth Proportional to 87,120,856.80, 130,681,285.20 and 85,609,202.40

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Solution

The fourth proportional to 87,120,856.80, 130,681,285.20 and 85,609,202.40 is: 128,413,803.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,120,856.80 : 130,681,285.20 = 85,609,202.40 : x
  2. Step 2: Convert to fraction form
    87,120,856.80/130,681,285.20 = 85,609,202.40/x
  3. Step 3: Cross multiply
    87,120,856.80x = 130,681,285.20 × 85,609,202.40
  4. Step 4: Simplify right side
    87,120,856.80x = 11,187,520,594,578,926
  5. Step 5: Solve for x
    x = 11,187,520,594,578,926/87,120,856.80
  6. Step 6: Final answer
    x = 128,413,803.60

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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.