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Finding the Fourth Proportional to 131,528.52, 181,509.38 and 71,099

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Solution

The fourth proportional to 131,528.52, 181,509.38 and 71,099 is: 98,116.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,528.52 : 181,509.38 = 71,099 : x
  2. Step 2: Convert to fraction form
    131,528.52/181,509.38 = 71,099/x
  3. Step 3: Cross multiply
    131,528.52x = 181,509.38 × 71,099
  4. Step 4: Simplify right side
    131,528.52x = 12,905,135,408.62
  5. Step 5: Solve for x
    x = 12,905,135,408.62/131,528.52
  6. Step 6: Final answer
    x = 98,116.63

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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.