Home / 128,456.16-192,689.28-39,701.76

Finding the Fourth Proportional to 128,456.16, 192,689.28 and 39,701.76

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Solution

The fourth proportional to 128,456.16, 192,689.28 and 39,701.76 is: 59,554.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,456.16 : 192,689.28 = 39,701.76 : x
  2. Step 2: Convert to fraction form
    128,456.16/192,689.28 = 39,701.76/x
  3. Step 3: Cross multiply
    128,456.16x = 192,689.28 × 39,701.76
  4. Step 4: Simplify right side
    128,456.16x = 7,650,103,549.13
  5. Step 5: Solve for x
    x = 7,650,103,549.13/128,456.16
  6. Step 6: Final answer
    x = 59,554.20

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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.