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Finding the Fourth Proportional to 334,340.95, 501,509.66 and 81,622.78

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Solution

The fourth proportional to 334,340.95, 501,509.66 and 81,622.78 is: 122,433.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    334,340.95 : 501,509.66 = 81,622.78 : x
  2. Step 2: Convert to fraction form
    334,340.95/501,509.66 = 81,622.78/x
  3. Step 3: Cross multiply
    334,340.95x = 501,509.66 × 81,622.78
  4. Step 4: Simplify right side
    334,340.95x = 40,934,612,646.05
  5. Step 5: Solve for x
    x = 40,934,612,646.05/334,340.95
  6. Step 6: Final answer
    x = 122,433.74

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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.