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Finding the Fourth Proportional to 143,789,105.80, 215,683,658.70 and 135,852,920.20

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Solution

The fourth proportional to 143,789,105.80, 215,683,658.70 and 135,852,920.20 is: 203,779,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,789,105.80 : 215,683,658.70 = 135,852,920.20 : x
  2. Step 2: Convert to fraction form
    143,789,105.80/215,683,658.70 = 135,852,920.20/x
  3. Step 3: Cross multiply
    143,789,105.80x = 215,683,658.70 × 135,852,920.20
  4. Step 4: Simplify right side
    143,789,105.80x = 29,301,254,873,815,132
  5. Step 5: Solve for x
    x = 29,301,254,873,815,132/143,789,105.80
  6. Step 6: Final answer
    x = 203,779,380.30

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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.