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Finding the Fourth Proportional to 140,918,878.30, 211,378,317.45 and 80,452,702.30

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Solution

The fourth proportional to 140,918,878.30, 211,378,317.45 and 80,452,702.30 is: 120,679,053.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,918,878.30 : 211,378,317.45 = 80,452,702.30 : x
  2. Step 2: Convert to fraction form
    140,918,878.30/211,378,317.45 = 80,452,702.30/x
  3. Step 3: Cross multiply
    140,918,878.30x = 211,378,317.45 × 80,452,702.30
  4. Step 4: Simplify right side
    140,918,878.30x = 17,005,956,846,479,744
  5. Step 5: Solve for x
    x = 17,005,956,846,479,744/140,918,878.30
  6. Step 6: Final answer
    x = 120,679,053.45

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1.5x scale

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.