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Finding the Fourth Proportional to 76,910.60, 115,365.90 and 47,232.20

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Solution

The fourth proportional to 76,910.60, 115,365.90 and 47,232.20 is: 70,848.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,910.60 : 115,365.90 = 47,232.20 : x
  2. Step 2: Convert to fraction form
    76,910.60/115,365.90 = 47,232.20/x
  3. Step 3: Cross multiply
    76,910.60x = 115,365.90 × 47,232.20
  4. Step 4: Simplify right side
    76,910.60x = 5,448,985,261.98
  5. Step 5: Solve for x
    x = 5,448,985,261.98/76,910.60
  6. Step 6: Final answer
    x = 70,848.30

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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.