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Finding the Fourth Proportional to 73,081.60, 109,665.60 and 26,328.40

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Solution

The fourth proportional to 73,081.60, 109,665.60 and 26,328.40 is: 39,508.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,081.60 : 109,665.60 = 26,328.40 : x
  2. Step 2: Convert to fraction form
    73,081.60/109,665.60 = 26,328.40/x
  3. Step 3: Cross multiply
    73,081.60x = 109,665.60 × 26,328.40
  4. Step 4: Simplify right side
    73,081.60x = 2,887,319,783.04
  5. Step 5: Solve for x
    x = 2,887,319,783.04/73,081.60
  6. Step 6: Final answer
    x = 39,508.16

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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.