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Finding the Fourth Proportional to 81,671.76, 112,703.40 and 45,861.12

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Solution

The fourth proportional to 81,671.76, 112,703.40 and 45,861.12 is: 63,286.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,671.76 : 112,703.40 = 45,861.12 : x
  2. Step 2: Convert to fraction form
    81,671.76/112,703.40 = 45,861.12/x
  3. Step 3: Cross multiply
    81,671.76x = 112,703.40 × 45,861.12
  4. Step 4: Simplify right side
    81,671.76x = 5,168,704,151.81
  5. Step 5: Solve for x
    x = 5,168,704,151.81/81,671.76
  6. Step 6: Final answer
    x = 63,286.31

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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.