Home / 121,823.10-168,167.70-74,091.78

Finding the Fourth Proportional to 121,823.10, 168,167.70 and 74,091.78

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Solution

The fourth proportional to 121,823.10, 168,167.70 and 74,091.78 is: 102,278.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,823.10 : 168,167.70 = 74,091.78 : x
  2. Step 2: Convert to fraction form
    121,823.10/168,167.70 = 74,091.78/x
  3. Step 3: Cross multiply
    121,823.10x = 168,167.70 × 74,091.78
  4. Step 4: Simplify right side
    121,823.10x = 12,459,844,231.51
  5. Step 5: Solve for x
    x = 12,459,844,231.51/121,823.10
  6. Step 6: Final answer
    x = 102,278.17

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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.