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Finding the Fourth Proportional to 359,516.85, 539,235.42 and 128,696.69

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Solution

The fourth proportional to 359,516.85, 539,235.42 and 128,696.69 is: 193,030.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,516.85 : 539,235.42 = 128,696.69 : x
  2. Step 2: Convert to fraction form
    359,516.85/539,235.42 = 128,696.69/x
  3. Step 3: Cross multiply
    359,516.85x = 539,235.42 × 128,696.69
  4. Step 4: Simplify right side
    359,516.85x = 69,397,810,988.58
  5. Step 5: Solve for x
    x = 69,397,810,988.58/359,516.85
  6. Step 6: Final answer
    x = 193,030.76

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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.