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Finding the Fourth Proportional to 102,987.20, 154,480.80 and 71,494.40

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Solution

The fourth proportional to 102,987.20, 154,480.80 and 71,494.40 is: 107,241.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,987.20 : 154,480.80 = 71,494.40 : x
  2. Step 2: Convert to fraction form
    102,987.20/154,480.80 = 71,494.40/x
  3. Step 3: Cross multiply
    102,987.20x = 154,480.80 × 71,494.40
  4. Step 4: Simplify right side
    102,987.20x = 11,044,512,107.52
  5. Step 5: Solve for x
    x = 11,044,512,107.52/102,987.20
  6. Step 6: Final answer
    x = 107,241.60

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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.