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Finding the Fourth Proportional to 207,280.80, 310,921.20 and 74,165.40

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Solution

The fourth proportional to 207,280.80, 310,921.20 and 74,165.40 is: 111,248.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,280.80 : 310,921.20 = 74,165.40 : x
  2. Step 2: Convert to fraction form
    207,280.80/310,921.20 = 74,165.40/x
  3. Step 3: Cross multiply
    207,280.80x = 310,921.20 × 74,165.40
  4. Step 4: Simplify right side
    207,280.80x = 23,059,595,166.48
  5. Step 5: Solve for x
    x = 23,059,595,166.48/207,280.80
  6. Step 6: Final answer
    x = 111,248.10

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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.