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Finding the Fourth Proportional to 121,802.60, 168,078.30 and 74,049.32

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Solution

The fourth proportional to 121,802.60, 168,078.30 and 74,049.32 is: 102,182.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,802.60 : 168,078.30 = 74,049.32 : x
  2. Step 2: Convert to fraction form
    121,802.60/168,078.30 = 74,049.32/x
  3. Step 3: Cross multiply
    121,802.60x = 168,078.30 × 74,049.32
  4. Step 4: Simplify right side
    121,802.60x = 12,446,083,821.76
  5. Step 5: Solve for x
    x = 12,446,083,821.76/121,802.60
  6. Step 6: Final answer
    x = 102,182.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.