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Finding the Fourth Proportional to 121,877.80, 182,816.70 and 108,658.60

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Solution

The fourth proportional to 121,877.80, 182,816.70 and 108,658.60 is: 162,987.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,877.80 : 182,816.70 = 108,658.60 : x
  2. Step 2: Convert to fraction form
    121,877.80/182,816.70 = 108,658.60/x
  3. Step 3: Cross multiply
    121,877.80x = 182,816.70 × 108,658.60
  4. Step 4: Simplify right side
    121,877.80x = 19,864,606,678.62
  5. Step 5: Solve for x
    x = 19,864,606,678.62/121,877.80
  6. Step 6: Final answer
    x = 162,987.90

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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.