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Finding the Fourth Proportional to 128,592.95, 177,796.89 and 112,631.60

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Solution

The fourth proportional to 128,592.95, 177,796.89 and 112,631.60 is: 155,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,592.95 : 177,796.89 = 112,631.60 : x
  2. Step 2: Convert to fraction form
    128,592.95/177,796.89 = 112,631.60/x
  3. Step 3: Cross multiply
    128,592.95x = 177,796.89 × 112,631.60
  4. Step 4: Simplify right side
    128,592.95x = 20,025,548,195.72
  5. Step 5: Solve for x
    x = 20,025,548,195.72/128,592.95
  6. Step 6: Final answer
    x = 155,728.20

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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.