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Finding the Fourth Proportional to 71,117.60, 106,675.70 and 28,987.80

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Solution

The fourth proportional to 71,117.60, 106,675.70 and 28,987.80 is: 43,481.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,117.60 : 106,675.70 = 28,987.80 : x
  2. Step 2: Convert to fraction form
    71,117.60/106,675.70 = 28,987.80/x
  3. Step 3: Cross multiply
    71,117.60x = 106,675.70 × 28,987.80
  4. Step 4: Simplify right side
    71,117.60x = 3,092,293,856.46
  5. Step 5: Solve for x
    x = 3,092,293,856.46/71,117.60
  6. Step 6: Final answer
    x = 43,481.41

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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.