Home / 142,309.09-196,381.07-81,899.14

Finding the Fourth Proportional to 142,309.09, 196,381.07 and 81,899.14

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Solution

The fourth proportional to 142,309.09, 196,381.07 and 81,899.14 is: 113,017.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,309.09 : 196,381.07 = 81,899.14 : x
  2. Step 2: Convert to fraction form
    142,309.09/196,381.07 = 81,899.14/x
  3. Step 3: Cross multiply
    142,309.09x = 196,381.07 × 81,899.14
  4. Step 4: Simplify right side
    142,309.09x = 16,083,440,745.28
  5. Step 5: Solve for x
    x = 16,083,440,745.28/142,309.09
  6. Step 6: Final answer
    x = 113,017.66

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1.5x scale

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.