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Finding the Fourth Proportional to 85,651.64, 128,468.24 and 22,478.10

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Solution

The fourth proportional to 85,651.64, 128,468.24 and 22,478.10 is: 33,714.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,651.64 : 128,468.24 = 22,478.10 : x
  2. Step 2: Convert to fraction form
    85,651.64/128,468.24 = 22,478.10/x
  3. Step 3: Cross multiply
    85,651.64x = 128,468.24 × 22,478.10
  4. Step 4: Simplify right side
    85,651.64x = 2,887,721,435.69
  5. Step 5: Solve for x
    x = 2,887,721,435.69/85,651.64
  6. Step 6: Final answer
    x = 33,714.72

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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.