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Finding the Fourth Proportional to 109,866.40, 164,540.40 and 74,615.20

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Solution

The fourth proportional to 109,866.40, 164,540.40 and 74,615.20 is: 111,746.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,866.40 : 164,540.40 = 74,615.20 : x
  2. Step 2: Convert to fraction form
    109,866.40/164,540.40 = 74,615.20/x
  3. Step 3: Cross multiply
    109,866.40x = 164,540.40 × 74,615.20
  4. Step 4: Simplify right side
    109,866.40x = 12,277,214,854.08
  5. Step 5: Solve for x
    x = 12,277,214,854.08/109,866.40
  6. Step 6: Final answer
    x = 111,746.77

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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.