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Finding the Fourth Proportional to 86,469.60, 129,704.40 and 61,100.40

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Solution

The fourth proportional to 86,469.60, 129,704.40 and 61,100.40 is: 91,650.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,469.60 : 129,704.40 = 61,100.40 : x
  2. Step 2: Convert to fraction form
    86,469.60/129,704.40 = 61,100.40/x
  3. Step 3: Cross multiply
    86,469.60x = 129,704.40 × 61,100.40
  4. Step 4: Simplify right side
    86,469.60x = 7,924,990,721.76
  5. Step 5: Solve for x
    x = 7,924,990,721.76/86,469.60
  6. Step 6: Final answer
    x = 91,650.60

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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.