Home / 128,320.47-192,478.59-38,363.39

Finding the Fourth Proportional to 128,320.47, 192,478.59 and 38,363.39

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Solution

The fourth proportional to 128,320.47, 192,478.59 and 38,363.39 is: 57,544.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,320.47 : 192,478.59 = 38,363.39 : x
  2. Step 2: Convert to fraction form
    128,320.47/192,478.59 = 38,363.39/x
  3. Step 3: Cross multiply
    128,320.47x = 192,478.59 × 38,363.39
  4. Step 4: Simplify right side
    128,320.47x = 7,384,131,552.15
  5. Step 5: Solve for x
    x = 7,384,131,552.15/128,320.47
  6. Step 6: Final answer
    x = 57,544.45

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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.