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Finding the Fourth Proportional to 86,031, 118,671.30 and 54,144.54

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Solution

The fourth proportional to 86,031, 118,671.30 and 54,144.54 is: 74,687.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,031 : 118,671.30 = 54,144.54 : x
  2. Step 2: Convert to fraction form
    86,031/118,671.30 = 54,144.54/x
  3. Step 3: Cross multiply
    86,031x = 118,671.30 × 54,144.54
  4. Step 4: Simplify right side
    86,031x = 6,425,402,949.70
  5. Step 5: Solve for x
    x = 6,425,402,949.70/86,031
  6. Step 6: Final answer
    x = 74,687.07

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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.