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Finding the Fourth Proportional to 73,026.40, 109,458.60 and 28,638.40

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Solution

The fourth proportional to 73,026.40, 109,458.60 and 28,638.40 is: 42,925.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,026.40 : 109,458.60 = 28,638.40 : x
  2. Step 2: Convert to fraction form
    73,026.40/109,458.60 = 28,638.40/x
  3. Step 3: Cross multiply
    73,026.40x = 109,458.60 × 28,638.40
  4. Step 4: Simplify right side
    73,026.40x = 3,134,719,170.24
  5. Step 5: Solve for x
    x = 3,134,719,170.24/73,026.40
  6. Step 6: Final answer
    x = 42,925.83

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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.