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Finding the Fourth Proportional to 124,411.60, 186,617.40 and 74,645.20

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Solution

The fourth proportional to 124,411.60, 186,617.40 and 74,645.20 is: 111,967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,411.60 : 186,617.40 = 74,645.20 : x
  2. Step 2: Convert to fraction form
    124,411.60/186,617.40 = 74,645.20/x
  3. Step 3: Cross multiply
    124,411.60x = 186,617.40 × 74,645.20
  4. Step 4: Simplify right side
    124,411.60x = 13,930,093,146.48
  5. Step 5: Solve for x
    x = 13,930,093,146.48/124,411.60
  6. Step 6: Final answer
    x = 111,967.80

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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.