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Finding the Fourth Proportional to 83,318.88, 124,978.32 and 20,994.24

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Solution

The fourth proportional to 83,318.88, 124,978.32 and 20,994.24 is: 31,491.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,318.88 : 124,978.32 = 20,994.24 : x
  2. Step 2: Convert to fraction form
    83,318.88/124,978.32 = 20,994.24/x
  3. Step 3: Cross multiply
    83,318.88x = 124,978.32 × 20,994.24
  4. Step 4: Simplify right side
    83,318.88x = 2,623,824,844.88
  5. Step 5: Solve for x
    x = 2,623,824,844.88/83,318.88
  6. Step 6: Final answer
    x = 31,491.36

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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.