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Finding the Fourth Proportional to 128,533.40, 192,828.90 and 49,640.60

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Solution

The fourth proportional to 128,533.40, 192,828.90 and 49,640.60 is: 74,472.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,533.40 : 192,828.90 = 49,640.60 : x
  2. Step 2: Convert to fraction form
    128,533.40/192,828.90 = 49,640.60/x
  3. Step 3: Cross multiply
    128,533.40x = 192,828.90 × 49,640.60
  4. Step 4: Simplify right side
    128,533.40x = 9,572,142,293.34
  5. Step 5: Solve for x
    x = 9,572,142,293.34/128,533.40
  6. Step 6: Final answer
    x = 74,472.02

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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.