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Finding the Fourth Proportional to 61,212.56, 91,868.04 and 31,639.05

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Solution

The fourth proportional to 61,212.56, 91,868.04 and 31,639.05 is: 47,484.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212.56 : 91,868.04 = 31,639.05 : x
  2. Step 2: Convert to fraction form
    61,212.56/91,868.04 = 31,639.05/x
  3. Step 3: Cross multiply
    61,212.56x = 91,868.04 × 31,639.05
  4. Step 4: Simplify right side
    61,212.56x = 2,906,617,510.96
  5. Step 5: Solve for x
    x = 2,906,617,510.96/61,212.56
  6. Step 6: Final answer
    x = 47,484.01

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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.