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Finding the Fourth Proportional to 128,889.52, 177,463.38 and 117,079.72

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Solution

The fourth proportional to 128,889.52, 177,463.38 and 117,079.72 is: 161,202.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,889.52 : 177,463.38 = 117,079.72 : x
  2. Step 2: Convert to fraction form
    128,889.52/177,463.38 = 117,079.72/x
  3. Step 3: Cross multiply
    128,889.52x = 177,463.38 × 117,079.72
  4. Step 4: Simplify right side
    128,889.52x = 20,777,362,840.65
  5. Step 5: Solve for x
    x = 20,777,362,840.65/128,889.52
  6. Step 6: Final answer
    x = 161,202.89

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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.