Home / 76,990.28-115,558.08-39,576.64

Finding the Fourth Proportional to 76,990.28, 115,558.08 and 39,576.64

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Solution

The fourth proportional to 76,990.28, 115,558.08 and 39,576.64 is: 59,402.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,990.28 : 115,558.08 = 39,576.64 : x
  2. Step 2: Convert to fraction form
    76,990.28/115,558.08 = 39,576.64/x
  3. Step 3: Cross multiply
    76,990.28x = 115,558.08 × 39,576.64
  4. Step 4: Simplify right side
    76,990.28x = 4,573,400,531.25
  5. Step 5: Solve for x
    x = 4,573,400,531.25/76,990.28
  6. Step 6: Final answer
    x = 59,402.31

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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.