Home / 221,043.80-331,598.62-78,878

Finding the Fourth Proportional to 221,043.80, 331,598.62 and 78,878

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Solution

The fourth proportional to 221,043.80, 331,598.62 and 78,878 is: 118,328.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,043.80 : 331,598.62 = 78,878 : x
  2. Step 2: Convert to fraction form
    221,043.80/331,598.62 = 78,878/x
  3. Step 3: Cross multiply
    221,043.80x = 331,598.62 × 78,878
  4. Step 4: Simplify right side
    221,043.80x = 26,155,835,948.36
  5. Step 5: Solve for x
    x = 26,155,835,948.36/221,043.80
  6. Step 6: Final answer
    x = 118,328.75

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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.