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Finding the Fourth Proportional to 72,618.96, 108,915.48 and 19,311.24

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Solution

The fourth proportional to 72,618.96, 108,915.48 and 19,311.24 is: 28,963.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,618.96 : 108,915.48 = 19,311.24 : x
  2. Step 2: Convert to fraction form
    72,618.96/108,915.48 = 19,311.24/x
  3. Step 3: Cross multiply
    72,618.96x = 108,915.48 × 19,311.24
  4. Step 4: Simplify right side
    72,618.96x = 2,103,292,974.00
  5. Step 5: Solve for x
    x = 2,103,292,974.00/72,618.96
  6. Step 6: Final answer
    x = 28,963.41

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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.