Home / 149,378.48-206,139.69-81,396.02

Finding the Fourth Proportional to 149,378.48, 206,139.69 and 81,396.02

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Solution

The fourth proportional to 149,378.48, 206,139.69 and 81,396.02 is: 112,325.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,378.48 : 206,139.69 = 81,396.02 : x
  2. Step 2: Convert to fraction form
    149,378.48/206,139.69 = 81,396.02/x
  3. Step 3: Cross multiply
    149,378.48x = 206,139.69 × 81,396.02
  4. Step 4: Simplify right side
    149,378.48x = 16,778,949,299.34
  5. Step 5: Solve for x
    x = 16,778,949,299.34/149,378.48
  6. Step 6: Final answer
    x = 112,325.08

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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.