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Finding the Fourth Proportional to 81,506.75, 112,479.62 and 47,538.69

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Solution

The fourth proportional to 81,506.75, 112,479.62 and 47,538.69 is: 65,603.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,506.75 : 112,479.62 = 47,538.69 : x
  2. Step 2: Convert to fraction form
    81,506.75/112,479.62 = 47,538.69/x
  3. Step 3: Cross multiply
    81,506.75x = 112,479.62 × 47,538.69
  4. Step 4: Simplify right side
    81,506.75x = 5,347,133,786.50
  5. Step 5: Solve for x
    x = 5,347,133,786.50/81,506.75
  6. Step 6: Final answer
    x = 65,603.57

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1.5x scale

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.