Home / 138,288.24-190,840.20-81,699.48

Finding the Fourth Proportional to 138,288.24, 190,840.20 and 81,699.48

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Solution

The fourth proportional to 138,288.24, 190,840.20 and 81,699.48 is: 112,746.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,288.24 : 190,840.20 = 81,699.48 : x
  2. Step 2: Convert to fraction form
    138,288.24/190,840.20 = 81,699.48/x
  3. Step 3: Cross multiply
    138,288.24x = 190,840.20 × 81,699.48
  4. Step 4: Simplify right side
    138,288.24x = 15,591,545,103.10
  5. Step 5: Solve for x
    x = 15,591,545,103.10/138,288.24
  6. Step 6: Final answer
    x = 112,746.72

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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.