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Finding the Fourth Proportional to 359,911.91, 539,452.67 and 135,128.98

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Solution

The fourth proportional to 359,911.91, 539,452.67 and 135,128.98 is: 202,537.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,911.91 : 539,452.67 = 135,128.98 : x
  2. Step 2: Convert to fraction form
    359,911.91/539,452.67 = 135,128.98/x
  3. Step 3: Cross multiply
    359,911.91x = 539,452.67 × 135,128.98
  4. Step 4: Simplify right side
    359,911.91x = 72,895,688,044.57
  5. Step 5: Solve for x
    x = 72,895,688,044.57/359,911.91
  6. Step 6: Final answer
    x = 202,537.58

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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.