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Finding the Fourth Proportional to 321,933.32, 482,909.10 and 85,276.02

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Solution

The fourth proportional to 321,933.32, 482,909.10 and 85,276.02 is: 127,916.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,933.32 : 482,909.10 = 85,276.02 : x
  2. Step 2: Convert to fraction form
    321,933.32/482,909.10 = 85,276.02/x
  3. Step 3: Cross multiply
    321,933.32x = 482,909.10 × 85,276.02
  4. Step 4: Simplify right side
    321,933.32x = 41,180,566,069.78
  5. Step 5: Solve for x
    x = 41,180,566,069.78/321,933.32
  6. Step 6: Final answer
    x = 127,916.45

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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.