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Finding the Fourth Proportional to 261,465.90, 392,153.71 and 69,341.66

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Solution

The fourth proportional to 261,465.90, 392,153.71 and 69,341.66 is: 104,000.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,465.90 : 392,153.71 = 69,341.66 : x
  2. Step 2: Convert to fraction form
    261,465.90/392,153.71 = 69,341.66/x
  3. Step 3: Cross multiply
    261,465.90x = 392,153.71 × 69,341.66
  4. Step 4: Simplify right side
    261,465.90x = 27,192,589,226.56
  5. Step 5: Solve for x
    x = 27,192,589,226.56/261,465.90
  6. Step 6: Final answer
    x = 104,000.52

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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.