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Finding the Fourth Proportional to 61,106.72, 91,670.96 and 31,516.56

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Solution

The fourth proportional to 61,106.72, 91,670.96 and 31,516.56 is: 47,280.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,106.72 : 91,670.96 = 31,516.56 : x
  2. Step 2: Convert to fraction form
    61,106.72/91,670.96 = 31,516.56/x
  3. Step 3: Cross multiply
    61,106.72x = 91,670.96 × 31,516.56
  4. Step 4: Simplify right side
    61,106.72x = 2,889,153,311.10
  5. Step 5: Solve for x
    x = 2,889,153,311.10/61,106.72
  6. Step 6: Final answer
    x = 47,280.45

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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.