Home / 143,782.61-198,420.78-83,389.06

Finding the Fourth Proportional to 143,782.61, 198,420.78 and 83,389.06

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Solution

The fourth proportional to 143,782.61, 198,420.78 and 83,389.06 is: 115,077.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,782.61 : 198,420.78 = 83,389.06 : x
  2. Step 2: Convert to fraction form
    143,782.61/198,420.78 = 83,389.06/x
  3. Step 3: Cross multiply
    143,782.61x = 198,420.78 × 83,389.06
  4. Step 4: Simplify right side
    143,782.61x = 16,546,122,328.67
  5. Step 5: Solve for x
    x = 16,546,122,328.67/143,782.61
  6. Step 6: Final answer
    x = 115,077.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.