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Finding the Fourth Proportional to 65,179.47, 97,779.80 and 20,190.32

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Solution

The fourth proportional to 65,179.47, 97,779.80 and 20,190.32 is: 30,288.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,179.47 : 97,779.80 = 20,190.32 : x
  2. Step 2: Convert to fraction form
    65,179.47/97,779.80 = 20,190.32/x
  3. Step 3: Cross multiply
    65,179.47x = 97,779.80 × 20,190.32
  4. Step 4: Simplify right side
    65,179.47x = 1,974,205,451.54
  5. Step 5: Solve for x
    x = 1,974,205,451.54/65,179.47
  6. Step 6: Final answer
    x = 30,288.76

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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.