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Finding the Fourth Proportional to 154,640.80, 231,320.40 and 145,194.40

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Solution

The fourth proportional to 154,640.80, 231,320.40 and 145,194.40 is: 217,189.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,640.80 : 231,320.40 = 145,194.40 : x
  2. Step 2: Convert to fraction form
    154,640.80/231,320.40 = 145,194.40/x
  3. Step 3: Cross multiply
    154,640.80x = 231,320.40 × 145,194.40
  4. Step 4: Simplify right side
    154,640.80x = 33,586,426,685.76
  5. Step 5: Solve for x
    x = 33,586,426,685.76/154,640.80
  6. Step 6: Final answer
    x = 217,189.94

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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.