Home / 128,111.40-192,167.10-118,780.20

Finding the Fourth Proportional to 128,111.40, 192,167.10 and 118,780.20

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Solution

The fourth proportional to 128,111.40, 192,167.10 and 118,780.20 is: 178,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,111.40 : 192,167.10 = 118,780.20 : x
  2. Step 2: Convert to fraction form
    128,111.40/192,167.10 = 118,780.20/x
  3. Step 3: Cross multiply
    128,111.40x = 192,167.10 × 118,780.20
  4. Step 4: Simplify right side
    128,111.40x = 22,825,646,571.42
  5. Step 5: Solve for x
    x = 22,825,646,571.42/128,111.40
  6. Step 6: Final answer
    x = 178,170.30

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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.