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Finding the Fourth Proportional to 261,480.90, 392,174.25 and 69,356.70

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Solution

The fourth proportional to 261,480.90, 392,174.25 and 69,356.70 is: 104,022.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,480.90 : 392,174.25 = 69,356.70 : x
  2. Step 2: Convert to fraction form
    261,480.90/392,174.25 = 69,356.70/x
  3. Step 3: Cross multiply
    261,480.90x = 392,174.25 × 69,356.70
  4. Step 4: Simplify right side
    261,480.90x = 27,199,911,804.98
  5. Step 5: Solve for x
    x = 27,199,911,804.98/261,480.90
  6. Step 6: Final answer
    x = 104,022.56

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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.