Home / 128,319.38-192,512.28-39,570.92

Finding the Fourth Proportional to 128,319.38, 192,512.28 and 39,570.92

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Solution

The fourth proportional to 128,319.38, 192,512.28 and 39,570.92 is: 59,366.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,319.38 : 192,512.28 = 39,570.92 : x
  2. Step 2: Convert to fraction form
    128,319.38/192,512.28 = 39,570.92/x
  3. Step 3: Cross multiply
    128,319.38x = 192,512.28 × 39,570.92
  4. Step 4: Simplify right side
    128,319.38x = 7,617,888,030.90
  5. Step 5: Solve for x
    x = 7,617,888,030.90/128,319.38
  6. Step 6: Final answer
    x = 59,366.62

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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.