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Finding the Fourth Proportional to 192,099.40, 288,146.40 and 86,918.20

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Solution

The fourth proportional to 192,099.40, 288,146.40 and 86,918.20 is: 130,376.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,099.40 : 288,146.40 = 86,918.20 : x
  2. Step 2: Convert to fraction form
    192,099.40/288,146.40 = 86,918.20/x
  3. Step 3: Cross multiply
    192,099.40x = 288,146.40 × 86,918.20
  4. Step 4: Simplify right side
    192,099.40x = 25,045,166,424.48
  5. Step 5: Solve for x
    x = 25,045,166,424.48/192,099.40
  6. Step 6: Final answer
    x = 130,376.08

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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.