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Finding the Fourth Proportional to 121,930.32, 182,910.16 and 43,028.40

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Solution

The fourth proportional to 121,930.32, 182,910.16 and 43,028.40 is: 64,547.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,930.32 : 182,910.16 = 43,028.40 : x
  2. Step 2: Convert to fraction form
    121,930.32/182,910.16 = 43,028.40/x
  3. Step 3: Cross multiply
    121,930.32x = 182,910.16 × 43,028.40
  4. Step 4: Simplify right side
    121,930.32x = 7,870,331,528.54
  5. Step 5: Solve for x
    x = 7,870,331,528.54/121,930.32
  6. Step 6: Final answer
    x = 64,547.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.