Home / 128,439.60-192,659.40-102,001.20

Finding the Fourth Proportional to 128,439.60, 192,659.40 and 102,001.20

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Solution

The fourth proportional to 128,439.60, 192,659.40 and 102,001.20 is: 153,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,439.60 : 192,659.40 = 102,001.20 : x
  2. Step 2: Convert to fraction form
    128,439.60/192,659.40 = 102,001.20/x
  3. Step 3: Cross multiply
    128,439.60x = 192,659.40 × 102,001.20
  4. Step 4: Simplify right side
    128,439.60x = 19,651,489,991.28
  5. Step 5: Solve for x
    x = 19,651,489,991.28/128,439.60
  6. Step 6: Final answer
    x = 153,001.80

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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.