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Finding the Fourth Proportional to 81,448.32, 112,395.36 and 47,458.56

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Solution

The fourth proportional to 81,448.32, 112,395.36 and 47,458.56 is: 65,490.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,448.32 : 112,395.36 = 47,458.56 : x
  2. Step 2: Convert to fraction form
    81,448.32/112,395.36 = 47,458.56/x
  3. Step 3: Cross multiply
    81,448.32x = 112,395.36 × 47,458.56
  4. Step 4: Simplify right side
    81,448.32x = 5,334,121,936.28
  5. Step 5: Solve for x
    x = 5,334,121,936.28/81,448.32
  6. Step 6: Final answer
    x = 65,490.88

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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.