Home / 128,001.20-192,001.80-126,772.40

Finding the Fourth Proportional to 128,001.20, 192,001.80 and 126,772.40

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Solution

The fourth proportional to 128,001.20, 192,001.80 and 126,772.40 is: 190,158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.20 : 192,001.80 = 126,772.40 : x
  2. Step 2: Convert to fraction form
    128,001.20/192,001.80 = 126,772.40/x
  3. Step 3: Cross multiply
    128,001.20x = 192,001.80 × 126,772.40
  4. Step 4: Simplify right side
    128,001.20x = 24,340,528,990.32
  5. Step 5: Solve for x
    x = 24,340,528,990.32/128,001.20
  6. Step 6: Final answer
    x = 190,158.60

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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.