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Finding the Fourth Proportional to 136,076.32, 187,724.64 and 90,710.32

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Solution

The fourth proportional to 136,076.32, 187,724.64 and 90,710.32 is: 125,139.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,076.32 : 187,724.64 = 90,710.32 : x
  2. Step 2: Convert to fraction form
    136,076.32/187,724.64 = 90,710.32/x
  3. Step 3: Cross multiply
    136,076.32x = 187,724.64 × 90,710.32
  4. Step 4: Simplify right side
    136,076.32x = 17,028,562,166.28
  5. Step 5: Solve for x
    x = 17,028,562,166.28/136,076.32
  6. Step 6: Final answer
    x = 125,139.79

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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.