Home / 121,814.16-168,155.32-74,082.80

Finding the Fourth Proportional to 121,814.16, 168,155.32 and 74,082.80

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Solution

The fourth proportional to 121,814.16, 168,155.32 and 74,082.80 is: 102,265.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,814.16 : 168,155.32 = 74,082.80 : x
  2. Step 2: Convert to fraction form
    121,814.16/168,155.32 = 74,082.80/x
  3. Step 3: Cross multiply
    121,814.16x = 168,155.32 × 74,082.80
  4. Step 4: Simplify right side
    121,814.16x = 12,457,416,940.50
  5. Step 5: Solve for x
    x = 12,457,416,940.50/121,814.16
  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.