Home / 81,531.57-112,465.90-51,268.98

Finding the Fourth Proportional to 81,531.57, 112,465.90 and 51,268.98

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Solution

The fourth proportional to 81,531.57, 112,465.90 and 51,268.98 is: 70,721.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,531.57 : 112,465.90 = 51,268.98 : x
  2. Step 2: Convert to fraction form
    81,531.57/112,465.90 = 51,268.98/x
  3. Step 3: Cross multiply
    81,531.57x = 112,465.90 × 51,268.98
  4. Step 4: Simplify right side
    81,531.57x = 5,766,011,977.78
  5. Step 5: Solve for x
    x = 5,766,011,977.78/81,531.57
  6. Step 6: Final answer
    x = 70,721.22

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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.