Home / 121,814.10-168,155.28-74,082.78

Finding the Fourth Proportional to 121,814.10, 168,155.28 and 74,082.78

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Solution

The fourth proportional to 121,814.10, 168,155.28 and 74,082.78 is: 102,265.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,814.10 : 168,155.28 = 74,082.78 : x
  2. Step 2: Convert to fraction form
    121,814.10/168,155.28 = 74,082.78/x
  3. Step 3: Cross multiply
    121,814.10x = 168,155.28 × 74,082.78
  4. Step 4: Simplify right side
    121,814.10x = 12,457,410,614.08
  5. Step 5: Solve for x
    x = 12,457,410,614.08/121,814.10
  6. Step 6: Final answer
    x = 102,265.75

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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.