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Finding the Fourth Proportional to 261,842.78, 392,763.43 and 69,717.19

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Solution

The fourth proportional to 261,842.78, 392,763.43 and 69,717.19 is: 104,575.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,842.78 : 392,763.43 = 69,717.19 : x
  2. Step 2: Convert to fraction form
    261,842.78/392,763.43 = 69,717.19/x
  3. Step 3: Cross multiply
    261,842.78x = 392,763.43 × 69,717.19
  4. Step 4: Simplify right side
    261,842.78x = 27,382,361,518.16
  5. Step 5: Solve for x
    x = 27,382,361,518.16/261,842.78
  6. Step 6: Final answer
    x = 104,575.58

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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.