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Finding the Fourth Proportional to 151,408.80, 208,878.48 and 90,120.62

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Solution

The fourth proportional to 151,408.80, 208,878.48 and 90,120.62 is: 124,327.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,408.80 : 208,878.48 = 90,120.62 : x
  2. Step 2: Convert to fraction form
    151,408.80/208,878.48 = 90,120.62/x
  3. Step 3: Cross multiply
    151,408.80x = 208,878.48 × 90,120.62
  4. Step 4: Simplify right side
    151,408.80x = 18,824,258,122.26
  5. Step 5: Solve for x
    x = 18,824,258,122.26/151,408.80
  6. Step 6: Final answer
    x = 124,327.37

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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.