Home / 109,345.70-164,083.35-72,012.80

Finding the Fourth Proportional to 109,345.70, 164,083.35 and 72,012.80

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Solution

The fourth proportional to 109,345.70, 164,083.35 and 72,012.80 is: 108,061.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,345.70 : 164,083.35 = 72,012.80 : x
  2. Step 2: Convert to fraction form
    109,345.70/164,083.35 = 72,012.80/x
  3. Step 3: Cross multiply
    109,345.70x = 164,083.35 × 72,012.80
  4. Step 4: Simplify right side
    109,345.70x = 11,816,101,466.88
  5. Step 5: Solve for x
    x = 11,816,101,466.88/109,345.70
  6. Step 6: Final answer
    x = 108,061.88

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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.