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Finding the Fourth Proportional to 81,395.84, 112,280.40 and 47,400.32

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Solution

The fourth proportional to 81,395.84, 112,280.40 and 47,400.32 is: 65,385.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,395.84 : 112,280.40 = 47,400.32 : x
  2. Step 2: Convert to fraction form
    81,395.84/112,280.40 = 47,400.32/x
  3. Step 3: Cross multiply
    81,395.84x = 112,280.40 × 47,400.32
  4. Step 4: Simplify right side
    81,395.84x = 5,322,126,889.73
  5. Step 5: Solve for x
    x = 5,322,126,889.73/81,395.84
  6. Step 6: Final answer
    x = 65,385.74

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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.