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Finding the Fourth Proportional to 124,171.84, 171,360.92 and 87,938.21

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Solution

The fourth proportional to 124,171.84, 171,360.92 and 87,938.21 is: 121,357.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,171.84 : 171,360.92 = 87,938.21 : x
  2. Step 2: Convert to fraction form
    124,171.84/171,360.92 = 87,938.21/x
  3. Step 3: Cross multiply
    124,171.84x = 171,360.92 × 87,938.21
  4. Step 4: Simplify right side
    124,171.84x = 15,069,171,758.44
  5. Step 5: Solve for x
    x = 15,069,171,758.44/124,171.84
  6. Step 6: Final answer
    x = 121,357.41

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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.