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Finding the Fourth Proportional to 43,129.60, 64,701.60 and 22,078.72

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Solution

The fourth proportional to 43,129.60, 64,701.60 and 22,078.72 is: 33,121.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,129.60 : 64,701.60 = 22,078.72 : x
  2. Step 2: Convert to fraction form
    43,129.60/64,701.60 = 22,078.72/x
  3. Step 3: Cross multiply
    43,129.60x = 64,701.60 × 22,078.72
  4. Step 4: Simplify right side
    43,129.60x = 1,428,528,509.95
  5. Step 5: Solve for x
    x = 1,428,528,509.95/43,129.60
  6. Step 6: Final answer
    x = 33,121.77

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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.