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Finding the Fourth Proportional to 151,089.56, 208,490.88 and 87,431.48

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Solution

The fourth proportional to 151,089.56, 208,490.88 and 87,431.48 is: 120,648.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,089.56 : 208,490.88 = 87,431.48 : x
  2. Step 2: Convert to fraction form
    151,089.56/208,490.88 = 87,431.48/x
  3. Step 3: Cross multiply
    151,089.56x = 208,490.88 × 87,431.48
  4. Step 4: Simplify right side
    151,089.56x = 18,228,666,204.90
  5. Step 5: Solve for x
    x = 18,228,666,204.90/151,089.56
  6. Step 6: Final answer
    x = 120,648.09

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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.