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Finding the Fourth Proportional to 158,607.72, 218,878.21 and 90,645.78

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Solution

The fourth proportional to 158,607.72, 218,878.21 and 90,645.78 is: 125,090.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,607.72 : 218,878.21 = 90,645.78 : x
  2. Step 2: Convert to fraction form
    158,607.72/218,878.21 = 90,645.78/x
  3. Step 3: Cross multiply
    158,607.72x = 218,878.21 × 90,645.78
  4. Step 4: Simplify right side
    158,607.72x = 19,840,385,843.84
  5. Step 5: Solve for x
    x = 19,840,385,843.84/158,607.72
  6. Step 6: Final answer
    x = 125,090.92

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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.