Home / 390,016,136.20-585,024,204.30-131,145,320.20

Finding the Fourth Proportional to 390,016,136.20, 585,024,204.30 and 131,145,320.20

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Solution

The fourth proportional to 390,016,136.20, 585,024,204.30 and 131,145,320.20 is: 196,717,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,016,136.20 : 585,024,204.30 = 131,145,320.20 : x
  2. Step 2: Convert to fraction form
    390,016,136.20/585,024,204.30 = 131,145,320.20/x
  3. Step 3: Cross multiply
    390,016,136.20x = 585,024,204.30 × 131,145,320.20
  4. Step 4: Simplify right side
    390,016,136.20x = 76,723,186,597,673,712
  5. Step 5: Solve for x
    x = 76,723,186,597,673,712/390,016,136.20
  6. Step 6: Final answer
    x = 196,717,980.30

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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.