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Finding the Fourth Proportional to 81,568.80, 112,570.32 and 45,761.16

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Solution

The fourth proportional to 81,568.80, 112,570.32 and 45,761.16 is: 63,153.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,568.80 : 112,570.32 = 45,761.16 : x
  2. Step 2: Convert to fraction form
    81,568.80/112,570.32 = 45,761.16/x
  3. Step 3: Cross multiply
    81,568.80x = 112,570.32 × 45,761.16
  4. Step 4: Simplify right side
    81,568.80x = 5,151,348,424.77
  5. Step 5: Solve for x
    x = 5,151,348,424.77/81,568.80
  6. Step 6: Final answer
    x = 63,153.42

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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.