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Finding the Fourth Proportional to 128,901.80, 193,352.70 and 127,152.20

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Solution

The fourth proportional to 128,901.80, 193,352.70 and 127,152.20 is: 190,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,901.80 : 193,352.70 = 127,152.20 : x
  2. Step 2: Convert to fraction form
    128,901.80/193,352.70 = 127,152.20/x
  3. Step 3: Cross multiply
    128,901.80x = 193,352.70 × 127,152.20
  4. Step 4: Simplify right side
    128,901.80x = 24,585,221,180.94
  5. Step 5: Solve for x
    x = 24,585,221,180.94/128,901.80
  6. Step 6: Final answer
    x = 190,728.30

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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.