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Finding the Fourth Proportional to 81,165.72, 112,009.28 and 45,357.24

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Solution

The fourth proportional to 81,165.72, 112,009.28 and 45,357.24 is: 62,593.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165.72 : 112,009.28 = 45,357.24 : x
  2. Step 2: Convert to fraction form
    81,165.72/112,009.28 = 45,357.24/x
  3. Step 3: Cross multiply
    81,165.72x = 112,009.28 × 45,357.24
  4. Step 4: Simplify right side
    81,165.72x = 5,080,431,795.19
  5. Step 5: Solve for x
    x = 5,080,431,795.19/81,165.72
  6. Step 6: Final answer
    x = 62,593.32

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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.