Home / 390,016,136.70-585,024,205.05-131,145,320.70

Finding the Fourth Proportional to 390,016,136.70, 585,024,205.05 and 131,145,320.70

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Solution

The fourth proportional to 390,016,136.70, 585,024,205.05 and 131,145,320.70 is: 196,717,981.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,016,136.70 : 585,024,205.05 = 131,145,320.70 : x
  2. Step 2: Convert to fraction form
    390,016,136.70/585,024,205.05 = 131,145,320.70/x
  3. Step 3: Cross multiply
    390,016,136.70x = 585,024,205.05 × 131,145,320.70
  4. Step 4: Simplify right side
    390,016,136.70x = 76,723,186,988,544,800
  5. Step 5: Solve for x
    x = 76,723,186,988,544,800/390,016,136.70
  6. Step 6: Final answer
    x = 196,717,981.05

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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.