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Finding the Fourth Proportional to 78,581, 117,713.82 and 39,018.44

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Solution

The fourth proportional to 78,581, 117,713.82 and 39,018.44 is: 58,449.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,581 : 117,713.82 = 39,018.44 : x
  2. Step 2: Convert to fraction form
    78,581/117,713.82 = 39,018.44/x
  3. Step 3: Cross multiply
    78,581x = 117,713.82 × 39,018.44
  4. Step 4: Simplify right side
    78,581x = 4,593,009,622.84
  5. Step 5: Solve for x
    x = 4,593,009,622.84/78,581
  6. Step 6: Final answer
    x = 58,449.37

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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.