Home / 128,074.04-192,126.38-39,315.88

Finding the Fourth Proportional to 128,074.04, 192,126.38 and 39,315.88

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Solution

The fourth proportional to 128,074.04, 192,126.38 and 39,315.88 is: 58,978.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,074.04 : 192,126.38 = 39,315.88 : x
  2. Step 2: Convert to fraction form
    128,074.04/192,126.38 = 39,315.88/x
  3. Step 3: Cross multiply
    128,074.04x = 192,126.38 × 39,315.88
  4. Step 4: Simplify right side
    128,074.04x = 7,553,617,700.91
  5. Step 5: Solve for x
    x = 7,553,617,700.91/128,074.04
  6. Step 6: Final answer
    x = 58,978.52

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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.