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Finding the Fourth Proportional to 104,417.20, 156,280.20 and 80,916.40

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Solution

The fourth proportional to 104,417.20, 156,280.20 and 80,916.40 is: 121,106.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,417.20 : 156,280.20 = 80,916.40 : x
  2. Step 2: Convert to fraction form
    104,417.20/156,280.20 = 80,916.40/x
  3. Step 3: Cross multiply
    104,417.20x = 156,280.20 × 80,916.40
  4. Step 4: Simplify right side
    104,417.20x = 12,645,631,175.28
  5. Step 5: Solve for x
    x = 12,645,631,175.28/104,417.20
  6. Step 6: Final answer
    x = 121,106.78

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1.5x scale

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.