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Finding the Fourth Proportional to 122,301.60, 183,452.40 and 103,639.20

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Solution

The fourth proportional to 122,301.60, 183,452.40 and 103,639.20 is: 155,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,301.60 : 183,452.40 = 103,639.20 : x
  2. Step 2: Convert to fraction form
    122,301.60/183,452.40 = 103,639.20/x
  3. Step 3: Cross multiply
    122,301.60x = 183,452.40 × 103,639.20
  4. Step 4: Simplify right side
    122,301.60x = 19,012,859,974.08
  5. Step 5: Solve for x
    x = 19,012,859,974.08/122,301.60
  6. Step 6: Final answer
    x = 155,458.80

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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.