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Finding the Fourth Proportional to 81,326.40, 112,226.40 and 45,516.48

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Solution

The fourth proportional to 81,326.40, 112,226.40 and 45,516.48 is: 62,810.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,326.40 : 112,226.40 = 45,516.48 : x
  2. Step 2: Convert to fraction form
    81,326.40/112,226.40 = 45,516.48/x
  3. Step 3: Cross multiply
    81,326.40x = 112,226.40 × 45,516.48
  4. Step 4: Simplify right side
    81,326.40x = 5,108,150,691.07
  5. Step 5: Solve for x
    x = 5,108,150,691.07/81,326.40
  6. Step 6: Final answer
    x = 62,810.49

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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.