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Finding the Fourth Proportional to 136,479.60, 204,233.40 and 86,583.60

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Solution

The fourth proportional to 136,479.60, 204,233.40 and 86,583.60 is: 129,567.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,479.60 : 204,233.40 = 86,583.60 : x
  2. Step 2: Convert to fraction form
    136,479.60/204,233.40 = 86,583.60/x
  3. Step 3: Cross multiply
    136,479.60x = 204,233.40 × 86,583.60
  4. Step 4: Simplify right side
    136,479.60x = 17,683,263,012.24
  5. Step 5: Solve for x
    x = 17,683,263,012.24/136,479.60
  6. Step 6: Final answer
    x = 129,567.08

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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.