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Finding the Fourth Proportional to 187,221.70, 280,832.55 and 153,979.30

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Solution

The fourth proportional to 187,221.70, 280,832.55 and 153,979.30 is: 230,968.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,221.70 : 280,832.55 = 153,979.30 : x
  2. Step 2: Convert to fraction form
    187,221.70/280,832.55 = 153,979.30/x
  3. Step 3: Cross multiply
    187,221.70x = 280,832.55 × 153,979.30
  4. Step 4: Simplify right side
    187,221.70x = 43,242,399,466.22
  5. Step 5: Solve for x
    x = 43,242,399,466.22/187,221.70
  6. Step 6: Final answer
    x = 230,968.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.