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Finding the Fourth Proportional to 115,646.40, 173,469.60 and 71,128.80

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Solution

The fourth proportional to 115,646.40, 173,469.60 and 71,128.80 is: 106,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,646.40 : 173,469.60 = 71,128.80 : x
  2. Step 2: Convert to fraction form
    115,646.40/173,469.60 = 71,128.80/x
  3. Step 3: Cross multiply
    115,646.40x = 173,469.60 × 71,128.80
  4. Step 4: Simplify right side
    115,646.40x = 12,338,684,484.48
  5. Step 5: Solve for x
    x = 12,338,684,484.48/115,646.40
  6. Step 6: Final answer
    x = 106,693.20

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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.