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Finding the Fourth Proportional to 261,585.56, 392,550.60 and 143,339.90

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Solution

The fourth proportional to 261,585.56, 392,550.60 and 143,339.90 is: 215,104.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,585.56 : 392,550.60 = 143,339.90 : x
  2. Step 2: Convert to fraction form
    261,585.56/392,550.60 = 143,339.90/x
  3. Step 3: Cross multiply
    261,585.56x = 392,550.60 × 143,339.90
  4. Step 4: Simplify right side
    261,585.56x = 56,268,163,748.94
  5. Step 5: Solve for x
    x = 56,268,163,748.94/261,585.56
  6. Step 6: Final answer
    x = 215,104.24

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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.