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Finding the Fourth Proportional to 66,436.56, 99,437.22 and 36,405

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Solution

The fourth proportional to 66,436.56, 99,437.22 and 36,405 is: 54,488.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,436.56 : 99,437.22 = 36,405 : x
  2. Step 2: Convert to fraction form
    66,436.56/99,437.22 = 36,405/x
  3. Step 3: Cross multiply
    66,436.56x = 99,437.22 × 36,405
  4. Step 4: Simplify right side
    66,436.56x = 3,620,011,994.10
  5. Step 5: Solve for x
    x = 3,620,011,994.10/66,436.56
  6. Step 6: Final answer
    x = 54,488.25

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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.