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Finding the Fourth Proportional to 73,313.78, 101,172.66 and 39,779.78

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Solution

The fourth proportional to 73,313.78, 101,172.66 and 39,779.78 is: 54,895.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,313.78 : 101,172.66 = 39,779.78 : x
  2. Step 2: Convert to fraction form
    73,313.78/101,172.66 = 39,779.78/x
  3. Step 3: Cross multiply
    73,313.78x = 101,172.66 × 39,779.78
  4. Step 4: Simplify right side
    73,313.78x = 4,024,626,156.81
  5. Step 5: Solve for x
    x = 4,024,626,156.81/73,313.78
  6. Step 6: Final answer
    x = 54,895.90

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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.