Home / 100,939.28-139,298.96-55,622.20

Finding the Fourth Proportional to 100,939.28, 139,298.96 and 55,622.20

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Solution

The fourth proportional to 100,939.28, 139,298.96 and 55,622.20 is: 76,760.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,939.28 : 139,298.96 = 55,622.20 : x
  2. Step 2: Convert to fraction form
    100,939.28/139,298.96 = 55,622.20/x
  3. Step 3: Cross multiply
    100,939.28x = 139,298.96 × 55,622.20
  4. Step 4: Simplify right side
    100,939.28x = 7,748,114,612.91
  5. Step 5: Solve for x
    x = 7,748,114,612.91/100,939.28
  6. Step 6: Final answer
    x = 76,760.15

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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.