Home / 148,006.10-221,899.80-81,521.30

Finding the Fourth Proportional to 148,006.10, 221,899.80 and 81,521.30

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Solution

The fourth proportional to 148,006.10, 221,899.80 and 81,521.30 is: 122,221.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,006.10 : 221,899.80 = 81,521.30 : x
  2. Step 2: Convert to fraction form
    148,006.10/221,899.80 = 81,521.30/x
  3. Step 3: Cross multiply
    148,006.10x = 221,899.80 × 81,521.30
  4. Step 4: Simplify right side
    148,006.10x = 18,089,560,165.74
  5. Step 5: Solve for x
    x = 18,089,560,165.74/148,006.10
  6. Step 6: Final answer
    x = 122,221.72

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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.