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Finding the Fourth Proportional to 72,877.50, 100,563.96 and 40,610.76

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Solution

The fourth proportional to 72,877.50, 100,563.96 and 40,610.76 is: 56,038.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,877.50 : 100,563.96 = 40,610.76 : x
  2. Step 2: Convert to fraction form
    72,877.50/100,563.96 = 40,610.76/x
  3. Step 3: Cross multiply
    72,877.50x = 100,563.96 × 40,610.76
  4. Step 4: Simplify right side
    72,877.50x = 4,083,978,844.21
  5. Step 5: Solve for x
    x = 4,083,978,844.21/72,877.50
  6. Step 6: Final answer
    x = 56,038.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.