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Finding the Fourth Proportional to 81,761.70, 112,512.32 and 72,352.74

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Solution

The fourth proportional to 81,761.70, 112,512.32 and 72,352.74 is: 99,564.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,761.70 : 112,512.32 = 72,352.74 : x
  2. Step 2: Convert to fraction form
    81,761.70/112,512.32 = 72,352.74/x
  3. Step 3: Cross multiply
    81,761.70x = 112,512.32 × 72,352.74
  4. Step 4: Simplify right side
    81,761.70x = 8,140,574,635.76
  5. Step 5: Solve for x
    x = 8,140,574,635.76/81,761.70
  6. Step 6: Final answer
    x = 99,564.65

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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.