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Finding the Fourth Proportional to 85,471.15, 128,206.81 and 22,291.21

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Solution

The fourth proportional to 85,471.15, 128,206.81 and 22,291.21 is: 33,436.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,471.15 : 128,206.81 = 22,291.21 : x
  2. Step 2: Convert to fraction form
    85,471.15/128,206.81 = 22,291.21/x
  3. Step 3: Cross multiply
    85,471.15x = 128,206.81 × 22,291.21
  4. Step 4: Simplify right side
    85,471.15x = 2,857,884,925.14
  5. Step 5: Solve for x
    x = 2,857,884,925.14/85,471.15
  6. Step 6: Final answer
    x = 33,436.84

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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.