Home / 424,209,967.42-636,406,538.87-129,128,161.81

Finding the Fourth Proportional to 424,209,967.42, 636,406,538.87 and 129,128,161.81

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Solution

The fourth proportional to 424,209,967.42, 636,406,538.87 and 129,128,161.81 is: 193,720,121.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,209,967.42 : 636,406,538.87 = 129,128,161.81 : x
  2. Step 2: Convert to fraction form
    424,209,967.42/636,406,538.87 = 129,128,161.81/x
  3. Step 3: Cross multiply
    424,209,967.42x = 636,406,538.87 × 129,128,161.81
  4. Step 4: Simplify right side
    424,209,967.42x = 82,178,006,527,501,776
  5. Step 5: Solve for x
    x = 82,178,006,527,501,776/424,209,967.42
  6. Step 6: Final answer
    x = 193,720,121.73

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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.