Home / 80,683,390.20-120,395,801.55-71,987,714.19

Finding the Fourth Proportional to 80,683,390.20, 120,395,801.55 and 71,987,714.19

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Solution

The fourth proportional to 80,683,390.20, 120,395,801.55 and 71,987,714.19 is: 107,420,108.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,683,390.20 : 120,395,801.55 = 71,987,714.19 : x
  2. Step 2: Convert to fraction form
    80,683,390.20/120,395,801.55 = 71,987,714.19/x
  3. Step 3: Cross multiply
    80,683,390.20x = 120,395,801.55 × 71,987,714.19
  4. Step 4: Simplify right side
    80,683,390.20x = 8,667,018,551,657,358
  5. Step 5: Solve for x
    x = 8,667,018,551,657,358/80,683,390.20
  6. Step 6: Final answer
    x = 107,420,108.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.