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Finding the Fourth Proportional to 137,328.40, 206,146.20 and 128,304.40

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Solution

The fourth proportional to 137,328.40, 206,146.20 and 128,304.40 is: 192,600.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,328.40 : 206,146.20 = 128,304.40 : x
  2. Step 2: Convert to fraction form
    137,328.40/206,146.20 = 128,304.40/x
  3. Step 3: Cross multiply
    137,328.40x = 206,146.20 × 128,304.40
  4. Step 4: Simplify right side
    137,328.40x = 26,449,464,503.28
  5. Step 5: Solve for x
    x = 26,449,464,503.28/137,328.40
  6. Step 6: Final answer
    x = 192,600.11

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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.