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Finding the Fourth Proportional to 76,903.98, 115,147.51 and 39,890.22

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Solution

The fourth proportional to 76,903.98, 115,147.51 and 39,890.22 is: 59,727.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,903.98 : 115,147.51 = 39,890.22 : x
  2. Step 2: Convert to fraction form
    76,903.98/115,147.51 = 39,890.22/x
  3. Step 3: Cross multiply
    76,903.98x = 115,147.51 × 39,890.22
  4. Step 4: Simplify right side
    76,903.98x = 4,593,259,506.35
  5. Step 5: Solve for x
    x = 4,593,259,506.35/76,903.98
  6. Step 6: Final answer
    x = 59,727.20

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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.