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Finding the Fourth Proportional to 261,837.60, 392,950.80 and 104,179.20

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Solution

The fourth proportional to 261,837.60, 392,950.80 and 104,179.20 is: 156,346.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,837.60 : 392,950.80 = 104,179.20 : x
  2. Step 2: Convert to fraction form
    261,837.60/392,950.80 = 104,179.20/x
  3. Step 3: Cross multiply
    261,837.60x = 392,950.80 × 104,179.20
  4. Step 4: Simplify right side
    261,837.60x = 40,937,299,983.36
  5. Step 5: Solve for x
    x = 40,937,299,983.36/261,837.60
  6. Step 6: Final answer
    x = 156,346.15

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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.