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Finding the Fourth Proportional to 81,671.34, 112,724.82 and 53,360.76

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Solution

The fourth proportional to 81,671.34, 112,724.82 and 53,360.76 is: 73,649.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,671.34 : 112,724.82 = 53,360.76 : x
  2. Step 2: Convert to fraction form
    81,671.34/112,724.82 = 53,360.76/x
  3. Step 3: Cross multiply
    81,671.34x = 112,724.82 × 53,360.76
  4. Step 4: Simplify right side
    81,671.34x = 6,015,082,066.06
  5. Step 5: Solve for x
    x = 6,015,082,066.06/81,671.34
  6. Step 6: Final answer
    x = 73,649.85

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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.