Home / 170,890.10-256,335.15-86,909.30

Finding the Fourth Proportional to 170,890.10, 256,335.15 and 86,909.30

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Solution

The fourth proportional to 170,890.10, 256,335.15 and 86,909.30 is: 130,363.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,890.10 : 256,335.15 = 86,909.30 : x
  2. Step 2: Convert to fraction form
    170,890.10/256,335.15 = 86,909.30/x
  3. Step 3: Cross multiply
    170,890.10x = 256,335.15 × 86,909.30
  4. Step 4: Simplify right side
    170,890.10x = 22,277,908,451.90
  5. Step 5: Solve for x
    x = 22,277,908,451.90/170,890.10
  6. Step 6: Final answer
    x = 130,363.95

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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.