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Finding the Fourth Proportional to 115,656.40, 173,484.60 and 71,138.80

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Solution

The fourth proportional to 115,656.40, 173,484.60 and 71,138.80 is: 106,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,656.40 : 173,484.60 = 71,138.80 : x
  2. Step 2: Convert to fraction form
    115,656.40/173,484.60 = 71,138.80/x
  3. Step 3: Cross multiply
    115,656.40x = 173,484.60 × 71,138.80
  4. Step 4: Simplify right side
    115,656.40x = 12,341,486,262.48
  5. Step 5: Solve for x
    x = 12,341,486,262.48/115,656.40
  6. Step 6: Final answer
    x = 106,708.20

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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.