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Finding the Fourth Proportional to 111,672.60, 154,108.80 and 60,685.74

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Solution

The fourth proportional to 111,672.60, 154,108.80 and 60,685.74 is: 83,746.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,672.60 : 154,108.80 = 60,685.74 : x
  2. Step 2: Convert to fraction form
    111,672.60/154,108.80 = 60,685.74/x
  3. Step 3: Cross multiply
    111,672.60x = 154,108.80 × 60,685.74
  4. Step 4: Simplify right side
    111,672.60x = 9,352,206,568.51
  5. Step 5: Solve for x
    x = 9,352,206,568.51/111,672.60
  6. Step 6: Final answer
    x = 83,746.65

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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.