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Finding the Fourth Proportional to 81,112.64, 111,935.12 and 45,302.64

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Solution

The fourth proportional to 81,112.64, 111,935.12 and 45,302.64 is: 62,517.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,112.64 : 111,935.12 = 45,302.64 : x
  2. Step 2: Convert to fraction form
    81,112.64/111,935.12 = 45,302.64/x
  3. Step 3: Cross multiply
    81,112.64x = 111,935.12 × 45,302.64
  4. Step 4: Simplify right side
    81,112.64x = 5,070,956,444.72
  5. Step 5: Solve for x
    x = 5,070,956,444.72/81,112.64
  6. Step 6: Final answer
    x = 62,517.46

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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.