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Finding the Fourth Proportional to 70,887.64, 106,345.44 and 20,287.14

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Solution

The fourth proportional to 70,887.64, 106,345.44 and 20,287.14 is: 30,434.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,887.64 : 106,345.44 = 20,287.14 : x
  2. Step 2: Convert to fraction form
    70,887.64/106,345.44 = 20,287.14/x
  3. Step 3: Cross multiply
    70,887.64x = 106,345.44 × 20,287.14
  4. Step 4: Simplify right side
    70,887.64x = 2,157,444,829.64
  5. Step 5: Solve for x
    x = 2,157,444,829.64/70,887.64
  6. Step 6: Final answer
    x = 30,434.71

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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.