Home / 156,378.25-215,800.77-84,756.43

Finding the Fourth Proportional to 156,378.25, 215,800.77 and 84,756.43

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Solution

The fourth proportional to 156,378.25, 215,800.77 and 84,756.43 is: 116,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,378.25 : 215,800.77 = 84,756.43 : x
  2. Step 2: Convert to fraction form
    156,378.25/215,800.77 = 84,756.43/x
  3. Step 3: Cross multiply
    156,378.25x = 215,800.77 × 84,756.43
  4. Step 4: Simplify right side
    156,378.25x = 18,290,502,856.45
  5. Step 5: Solve for x
    x = 18,290,502,856.45/156,378.25
  6. Step 6: Final answer
    x = 116,963.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.