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Finding the Fourth Proportional to 121,005.70, 181,508.55 and 61,821.70

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Solution

The fourth proportional to 121,005.70, 181,508.55 and 61,821.70 is: 92,732.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,005.70 : 181,508.55 = 61,821.70 : x
  2. Step 2: Convert to fraction form
    121,005.70/181,508.55 = 61,821.70/x
  3. Step 3: Cross multiply
    121,005.70x = 181,508.55 × 61,821.70
  4. Step 4: Simplify right side
    121,005.70x = 11,221,167,125.54
  5. Step 5: Solve for x
    x = 11,221,167,125.54/121,005.70
  6. Step 6: Final answer
    x = 92,732.55

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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.