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Finding the Fourth Proportional to 70,876.60, 106,314.90 and 39,707.80

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Solution

The fourth proportional to 70,876.60, 106,314.90 and 39,707.80 is: 59,561.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,876.60 : 106,314.90 = 39,707.80 : x
  2. Step 2: Convert to fraction form
    70,876.60/106,314.90 = 39,707.80/x
  3. Step 3: Cross multiply
    70,876.60x = 106,314.90 × 39,707.80
  4. Step 4: Simplify right side
    70,876.60x = 4,221,530,786.22
  5. Step 5: Solve for x
    x = 4,221,530,786.22/70,876.60
  6. Step 6: Final answer
    x = 59,561.70

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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.