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Finding the Fourth Proportional to 72,331.30, 108,496.95 and 19,746.10

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Solution

The fourth proportional to 72,331.30, 108,496.95 and 19,746.10 is: 29,619.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,331.30 : 108,496.95 = 19,746.10 : x
  2. Step 2: Convert to fraction form
    72,331.30/108,496.95 = 19,746.10/x
  3. Step 3: Cross multiply
    72,331.30x = 108,496.95 × 19,746.10
  4. Step 4: Simplify right side
    72,331.30x = 2,142,391,624.40
  5. Step 5: Solve for x
    x = 2,142,391,624.40/72,331.30
  6. Step 6: Final answer
    x = 29,619.15

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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.