Home / 76,531.12-105,576.21-65,902.30

Finding the Fourth Proportional to 76,531.12, 105,576.21 and 65,902.30

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Solution

The fourth proportional to 76,531.12, 105,576.21 and 65,902.30 is: 90,913.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,531.12 : 105,576.21 = 65,902.30 : x
  2. Step 2: Convert to fraction form
    76,531.12/105,576.21 = 65,902.30/x
  3. Step 3: Cross multiply
    76,531.12x = 105,576.21 × 65,902.30
  4. Step 4: Simplify right side
    76,531.12x = 6,957,715,064.28
  5. Step 5: Solve for x
    x = 6,957,715,064.28/76,531.12
  6. Step 6: Final answer
    x = 90,913.54

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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.