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Finding the Fourth Proportional to 254,675.80, 381,734.70 and 128,114.20

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Solution

The fourth proportional to 254,675.80, 381,734.70 and 128,114.20 is: 192,030.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,675.80 : 381,734.70 = 128,114.20 : x
  2. Step 2: Convert to fraction form
    254,675.80/381,734.70 = 128,114.20/x
  3. Step 3: Cross multiply
    254,675.80x = 381,734.70 × 128,114.20
  4. Step 4: Simplify right side
    254,675.80x = 48,905,635,702.74
  5. Step 5: Solve for x
    x = 48,905,635,702.74/254,675.80
  6. Step 6: Final answer
    x = 192,030.95

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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.