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Finding the Fourth Proportional to 261,613, 392,423.19 and 74,624.50

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Solution

The fourth proportional to 261,613, 392,423.19 and 74,624.50 is: 111,937.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,613 : 392,423.19 = 74,624.50 : x
  2. Step 2: Convert to fraction form
    261,613/392,423.19 = 74,624.50/x
  3. Step 3: Cross multiply
    261,613x = 392,423.19 × 74,624.50
  4. Step 4: Simplify right side
    261,613x = 29,284,384,342.16
  5. Step 5: Solve for x
    x = 29,284,384,342.16/261,613
  6. Step 6: Final answer
    x = 111,937.80

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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.