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Finding the Fourth Proportional to 359,861.39, 539,868.20 and 135,223.77

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Solution

The fourth proportional to 359,861.39, 539,868.20 and 135,223.77 is: 202,864.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,861.39 : 539,868.20 = 135,223.77 : x
  2. Step 2: Convert to fraction form
    359,861.39/539,868.20 = 135,223.77/x
  3. Step 3: Cross multiply
    359,861.39x = 539,868.20 × 135,223.77
  4. Step 4: Simplify right side
    359,861.39x = 73,003,013,307.11
  5. Step 5: Solve for x
    x = 73,003,013,307.11/359,861.39
  6. Step 6: Final answer
    x = 202,864.26

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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.