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Finding the Fourth Proportional to 76,808.64, 115,228.64 and 43,543.56

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Solution

The fourth proportional to 76,808.64, 115,228.64 and 43,543.56 is: 65,324.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,808.64 : 115,228.64 = 43,543.56 : x
  2. Step 2: Convert to fraction form
    76,808.64/115,228.64 = 43,543.56/x
  3. Step 3: Cross multiply
    76,808.64x = 115,228.64 × 43,543.56
  4. Step 4: Simplify right side
    76,808.64x = 5,017,465,199.56
  5. Step 5: Solve for x
    x = 5,017,465,199.56/76,808.64
  6. Step 6: Final answer
    x = 65,324.23

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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.