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Finding the Fourth Proportional to 128,280.80, 192,680.40 and 123,874.40

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Solution

The fourth proportional to 128,280.80, 192,680.40 and 123,874.40 is: 186,061.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,280.80 : 192,680.40 = 123,874.40 : x
  2. Step 2: Convert to fraction form
    128,280.80/192,680.40 = 123,874.40/x
  3. Step 3: Cross multiply
    128,280.80x = 192,680.40 × 123,874.40
  4. Step 4: Simplify right side
    128,280.80x = 23,868,168,941.76
  5. Step 5: Solve for x
    x = 23,868,168,941.76/128,280.80
  6. Step 6: Final answer
    x = 186,061.90

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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.