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Finding the Fourth Proportional to 261,885.86, 392,851.44 and 72,346.17

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Solution

The fourth proportional to 261,885.86, 392,851.44 and 72,346.17 is: 108,525.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,885.86 : 392,851.44 = 72,346.17 : x
  2. Step 2: Convert to fraction form
    261,885.86/392,851.44 = 72,346.17/x
  3. Step 3: Cross multiply
    261,885.86x = 392,851.44 × 72,346.17
  4. Step 4: Simplify right side
    261,885.86x = 28,421,297,062.98
  5. Step 5: Solve for x
    x = 28,421,297,062.98/261,885.86
  6. Step 6: Final answer
    x = 108,525.51

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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.