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Finding the Fourth Proportional to 76,911.60, 115,367.40 and 57,228.60

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Solution

The fourth proportional to 76,911.60, 115,367.40 and 57,228.60 is: 85,842.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,911.60 : 115,367.40 = 57,228.60 : x
  2. Step 2: Convert to fraction form
    76,911.60/115,367.40 = 57,228.60/x
  3. Step 3: Cross multiply
    76,911.60x = 115,367.40 × 57,228.60
  4. Step 4: Simplify right side
    76,911.60x = 6,602,314,787.64
  5. Step 5: Solve for x
    x = 6,602,314,787.64/76,911.60
  6. Step 6: Final answer
    x = 85,842.90

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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.