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Finding the Fourth Proportional to 121,411.60, 182,117.40 and 108,617.65

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Solution

The fourth proportional to 121,411.60, 182,117.40 and 108,617.65 is: 162,926.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,411.60 : 182,117.40 = 108,617.65 : x
  2. Step 2: Convert to fraction form
    121,411.60/182,117.40 = 108,617.65/x
  3. Step 3: Cross multiply
    121,411.60x = 182,117.40 × 108,617.65
  4. Step 4: Simplify right side
    121,411.60x = 19,781,164,012.11
  5. Step 5: Solve for x
    x = 19,781,164,012.11/121,411.60
  6. Step 6: Final answer
    x = 162,926.48

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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.