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Finding the Fourth Proportional to 76,638.92, 114,924.87 and 38,664.82

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Solution

The fourth proportional to 76,638.92, 114,924.87 and 38,664.82 is: 57,980.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,638.92 : 114,924.87 = 38,664.82 : x
  2. Step 2: Convert to fraction form
    76,638.92/114,924.87 = 38,664.82/x
  3. Step 3: Cross multiply
    76,638.92x = 114,924.87 × 38,664.82
  4. Step 4: Simplify right side
    76,638.92x = 4,443,549,769.46
  5. Step 5: Solve for x
    x = 4,443,549,769.46/76,638.92
  6. Step 6: Final answer
    x = 57,980.33

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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.