Home / 131,217.72-181,165.95-100,947.21

Finding the Fourth Proportional to 131,217.72, 181,165.95 and 100,947.21

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Solution

The fourth proportional to 131,217.72, 181,165.95 and 100,947.21 is: 139,372.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,217.72 : 181,165.95 = 100,947.21 : x
  2. Step 2: Convert to fraction form
    131,217.72/181,165.95 = 100,947.21/x
  3. Step 3: Cross multiply
    131,217.72x = 181,165.95 × 100,947.21
  4. Step 4: Simplify right side
    131,217.72x = 18,288,197,199.50
  5. Step 5: Solve for x
    x = 18,288,197,199.50/131,217.72
  6. Step 6: Final answer
    x = 139,372.92

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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.