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Finding the Fourth Proportional to 261,871.85, 392,799.98 and 72,343.63

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Solution

The fourth proportional to 261,871.85, 392,799.98 and 72,343.63 is: 108,513.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,871.85 : 392,799.98 = 72,343.63 : x
  2. Step 2: Convert to fraction form
    261,871.85/392,799.98 = 72,343.63/x
  3. Step 3: Cross multiply
    261,871.85x = 392,799.98 × 72,343.63
  4. Step 4: Simplify right side
    261,871.85x = 28,416,574,453.13
  5. Step 5: Solve for x
    x = 28,416,574,453.13/261,871.85
  6. Step 6: Final answer
    x = 108,513.28

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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.