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Finding the Fourth Proportional to 72,378.32, 108,558.82 and 30,837.20

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Solution

The fourth proportional to 72,378.32, 108,558.82 and 30,837.20 is: 46,252.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,378.32 : 108,558.82 = 30,837.20 : x
  2. Step 2: Convert to fraction form
    72,378.32/108,558.82 = 30,837.20/x
  3. Step 3: Cross multiply
    72,378.32x = 108,558.82 × 30,837.20
  4. Step 4: Simplify right side
    72,378.32x = 3,347,650,044.10
  5. Step 5: Solve for x
    x = 3,347,650,044.10/72,378.32
  6. Step 6: Final answer
    x = 46,252.11

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1.5x scale

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.