Home / 128,104.07-192,153.45-42,721.08

Finding the Fourth Proportional to 128,104.07, 192,153.45 and 42,721.08

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Solution

The fourth proportional to 128,104.07, 192,153.45 and 42,721.08 is: 64,080.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,104.07 : 192,153.45 = 42,721.08 : x
  2. Step 2: Convert to fraction form
    128,104.07/192,153.45 = 42,721.08/x
  3. Step 3: Cross multiply
    128,104.07x = 192,153.45 × 42,721.08
  4. Step 4: Simplify right side
    128,104.07x = 8,209,002,909.73
  5. Step 5: Solve for x
    x = 8,209,002,909.73/128,104.07
  6. Step 6: Final answer
    x = 64,080.73

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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.