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Finding the Fourth Proportional to 80,964.40, 121,446.60 and 64,051.60

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Solution

The fourth proportional to 80,964.40, 121,446.60 and 64,051.60 is: 96,077.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,964.40 : 121,446.60 = 64,051.60 : x
  2. Step 2: Convert to fraction form
    80,964.40/121,446.60 = 64,051.60/x
  3. Step 3: Cross multiply
    80,964.40x = 121,446.60 × 64,051.60
  4. Step 4: Simplify right side
    80,964.40x = 7,778,849,044.56
  5. Step 5: Solve for x
    x = 7,778,849,044.56/80,964.40
  6. Step 6: Final answer
    x = 96,077.40

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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.