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Finding the Fourth Proportional to 76,670.55, 115,005.83 and 56,987.55

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Solution

The fourth proportional to 76,670.55, 115,005.83 and 56,987.55 is: 85,481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,670.55 : 115,005.83 = 56,987.55 : x
  2. Step 2: Convert to fraction form
    76,670.55/115,005.83 = 56,987.55/x
  3. Step 3: Cross multiply
    76,670.55x = 115,005.83 × 56,987.55
  4. Step 4: Simplify right side
    76,670.55x = 6,553,900,202.48
  5. Step 5: Solve for x
    x = 6,553,900,202.48/76,670.55
  6. Step 6: Final answer
    x = 85,481.33

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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.