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Finding the Fourth Proportional to 72,389.40, 108,504.90 and 25,618.20

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Solution

The fourth proportional to 72,389.40, 108,504.90 and 25,618.20 is: 38,399.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,389.40 : 108,504.90 = 25,618.20 : x
  2. Step 2: Convert to fraction form
    72,389.40/108,504.90 = 25,618.20/x
  3. Step 3: Cross multiply
    72,389.40x = 108,504.90 × 25,618.20
  4. Step 4: Simplify right side
    72,389.40x = 2,779,700,229.18
  5. Step 5: Solve for x
    x = 2,779,700,229.18/72,389.40
  6. Step 6: Final answer
    x = 38,399.27

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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.