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Finding the Fourth Proportional to 76,662.90, 105,794.03 and 42,670.85

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Solution

The fourth proportional to 76,662.90, 105,794.03 and 42,670.85 is: 58,885.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,662.90 : 105,794.03 = 42,670.85 : x
  2. Step 2: Convert to fraction form
    76,662.90/105,794.03 = 42,670.85/x
  3. Step 3: Cross multiply
    76,662.90x = 105,794.03 × 42,670.85
  4. Step 4: Simplify right side
    76,662.90x = 4,514,320,762.73
  5. Step 5: Solve for x
    x = 4,514,320,762.73/76,662.90
  6. Step 6: Final answer
    x = 58,885.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.