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Finding the Fourth Proportional to 76,799.80, 115,199.70 and 57,116.80

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Solution

The fourth proportional to 76,799.80, 115,199.70 and 57,116.80 is: 85,675.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,799.80 : 115,199.70 = 57,116.80 : x
  2. Step 2: Convert to fraction form
    76,799.80/115,199.70 = 57,116.80/x
  3. Step 3: Cross multiply
    76,799.80x = 115,199.70 × 57,116.80
  4. Step 4: Simplify right side
    76,799.80x = 6,579,838,224.96
  5. Step 5: Solve for x
    x = 6,579,838,224.96/76,799.80
  6. Step 6: Final answer
    x = 85,675.20

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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.