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Finding the Fourth Proportional to 120,300.30, 166,018.86 and 65,856.30

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Solution

The fourth proportional to 120,300.30, 166,018.86 and 65,856.30 is: 90,884.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,300.30 : 166,018.86 = 65,856.30 : x
  2. Step 2: Convert to fraction form
    120,300.30/166,018.86 = 65,856.30/x
  3. Step 3: Cross multiply
    120,300.30x = 166,018.86 × 65,856.30
  4. Step 4: Simplify right side
    120,300.30x = 10,933,387,849.82
  5. Step 5: Solve for x
    x = 10,933,387,849.82/120,300.30
  6. Step 6: Final answer
    x = 90,884.13

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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.