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Finding the Fourth Proportional to 124,128, 171,295.20 and 67,538.40

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Solution

The fourth proportional to 124,128, 171,295.20 and 67,538.40 is: 93,202.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,128 : 171,295.20 = 67,538.40 : x
  2. Step 2: Convert to fraction form
    124,128/171,295.20 = 67,538.40/x
  3. Step 3: Cross multiply
    124,128x = 171,295.20 × 67,538.40
  4. Step 4: Simplify right side
    124,128x = 11,569,003,735.68
  5. Step 5: Solve for x
    x = 11,569,003,735.68/124,128
  6. Step 6: Final answer
    x = 93,202.21

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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.