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Finding the Fourth Proportional to 72,234.40, 99,711.12 and 43,938.40

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Solution

The fourth proportional to 72,234.40, 99,711.12 and 43,938.40 is: 60,651.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,234.40 : 99,711.12 = 43,938.40 : x
  2. Step 2: Convert to fraction form
    72,234.40/99,711.12 = 43,938.40/x
  3. Step 3: Cross multiply
    72,234.40x = 99,711.12 × 43,938.40
  4. Step 4: Simplify right side
    72,234.40x = 4,381,147,075.01
  5. Step 5: Solve for x
    x = 4,381,147,075.01/72,234.40
  6. Step 6: Final answer
    x = 60,651.81

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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.