Home / 81,115.95-111,915.51-47,117.82

Finding the Fourth Proportional to 81,115.95, 111,915.51 and 47,117.82

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Solution

The fourth proportional to 81,115.95, 111,915.51 and 47,117.82 is: 65,008.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,115.95 : 111,915.51 = 47,117.82 : x
  2. Step 2: Convert to fraction form
    81,115.95/111,915.51 = 47,117.82/x
  3. Step 3: Cross multiply
    81,115.95x = 111,915.51 × 47,117.82
  4. Step 4: Simplify right side
    81,115.95x = 5,273,214,855.39
  5. Step 5: Solve for x
    x = 5,273,214,855.39/81,115.95
  6. Step 6: Final answer
    x = 65,008.36

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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.