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Finding the Fourth Proportional to 104,342.48, 156,163.80 and 85,621.76

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Solution

The fourth proportional to 104,342.48, 156,163.80 and 85,621.76 is: 128,145.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,342.48 : 156,163.80 = 85,621.76 : x
  2. Step 2: Convert to fraction form
    104,342.48/156,163.80 = 85,621.76/x
  3. Step 3: Cross multiply
    104,342.48x = 156,163.80 × 85,621.76
  4. Step 4: Simplify right side
    104,342.48x = 13,371,019,404.29
  5. Step 5: Solve for x
    x = 13,371,019,404.29/104,342.48
  6. Step 6: Final answer
    x = 128,145.50

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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.