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Finding the Fourth Proportional to 82,709.70, 124,064.55 and 76,877.70

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Solution

The fourth proportional to 82,709.70, 124,064.55 and 76,877.70 is: 115,316.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,709.70 : 124,064.55 = 76,877.70 : x
  2. Step 2: Convert to fraction form
    82,709.70/124,064.55 = 76,877.70/x
  3. Step 3: Cross multiply
    82,709.70x = 124,064.55 × 76,877.70
  4. Step 4: Simplify right side
    82,709.70x = 9,537,797,255.54
  5. Step 5: Solve for x
    x = 9,537,797,255.54/82,709.70
  6. Step 6: Final answer
    x = 115,316.55

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1.5x scale

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.