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Finding the Fourth Proportional to 81,458.71, 112,417.68 and 45,660.28

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Solution

The fourth proportional to 81,458.71, 112,417.68 and 45,660.28 is: 63,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,458.71 : 112,417.68 = 45,660.28 : x
  2. Step 2: Convert to fraction form
    81,458.71/112,417.68 = 45,660.28/x
  3. Step 3: Cross multiply
    81,458.71x = 112,417.68 × 45,660.28
  4. Step 4: Simplify right side
    81,458.71x = 5,133,022,745.75
  5. Step 5: Solve for x
    x = 5,133,022,745.75/81,458.71
  6. Step 6: Final answer
    x = 63,013.80

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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.