Home / 143,840.80-216,020.40-139,175.20

Finding the Fourth Proportional to 143,840.80, 216,020.40 and 139,175.20

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Solution

The fourth proportional to 143,840.80, 216,020.40 and 139,175.20 is: 209,013.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,840.80 : 216,020.40 = 139,175.20 : x
  2. Step 2: Convert to fraction form
    143,840.80/216,020.40 = 139,175.20/x
  3. Step 3: Cross multiply
    143,840.80x = 216,020.40 × 139,175.20
  4. Step 4: Simplify right side
    143,840.80x = 30,064,682,374.08
  5. Step 5: Solve for x
    x = 30,064,682,374.08/143,840.80
  6. Step 6: Final answer
    x = 209,013.59

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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.