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Finding the Fourth Proportional to 173,128.40, 259,546.80 and 90,022.40

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Solution

The fourth proportional to 173,128.40, 259,546.80 and 90,022.40 is: 134,957.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,128.40 : 259,546.80 = 90,022.40 : x
  2. Step 2: Convert to fraction form
    173,128.40/259,546.80 = 90,022.40/x
  3. Step 3: Cross multiply
    173,128.40x = 259,546.80 × 90,022.40
  4. Step 4: Simplify right side
    173,128.40x = 23,365,025,848.32
  5. Step 5: Solve for x
    x = 23,365,025,848.32/173,128.40
  6. Step 6: Final answer
    x = 134,957.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.