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Finding the Fourth Proportional to 72,299.85, 99,779.49 and 53,266.65

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Solution

The fourth proportional to 72,299.85, 99,779.49 and 53,266.65 is: 73,512.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,299.85 : 99,779.49 = 53,266.65 : x
  2. Step 2: Convert to fraction form
    72,299.85/99,779.49 = 53,266.65/x
  3. Step 3: Cross multiply
    72,299.85x = 99,779.49 × 53,266.65
  4. Step 4: Simplify right side
    72,299.85x = 5,314,919,171.01
  5. Step 5: Solve for x
    x = 5,314,919,171.01/72,299.85
  6. Step 6: Final answer
    x = 73,512.17

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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.