Home / 128,385.42-192,578.70-84,291.18

Finding the Fourth Proportional to 128,385.42, 192,578.70 and 84,291.18

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Solution

The fourth proportional to 128,385.42, 192,578.70 and 84,291.18 is: 126,437.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,385.42 : 192,578.70 = 84,291.18 : x
  2. Step 2: Convert to fraction form
    128,385.42/192,578.70 = 84,291.18/x
  3. Step 3: Cross multiply
    128,385.42x = 192,578.70 × 84,291.18
  4. Step 4: Simplify right side
    128,385.42x = 16,232,685,865.87
  5. Step 5: Solve for x
    x = 16,232,685,865.87/128,385.42
  6. Step 6: Final answer
    x = 126,437.14

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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.