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Finding the Fourth Proportional to 86,601.60, 129,902.40 and 70,855.20

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Solution

The fourth proportional to 86,601.60, 129,902.40 and 70,855.20 is: 106,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,601.60 : 129,902.40 = 70,855.20 : x
  2. Step 2: Convert to fraction form
    86,601.60/129,902.40 = 70,855.20/x
  3. Step 3: Cross multiply
    86,601.60x = 129,902.40 × 70,855.20
  4. Step 4: Simplify right side
    86,601.60x = 9,204,260,532.48
  5. Step 5: Solve for x
    x = 9,204,260,532.48/86,601.60
  6. Step 6: Final answer
    x = 106,282.80

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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.