Home / 81,456.12-112,403.77-45,157.21

Finding the Fourth Proportional to 81,456.12, 112,403.77 and 45,157.21

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Solution

The fourth proportional to 81,456.12, 112,403.77 and 45,157.21 is: 62,313.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,456.12 : 112,403.77 = 45,157.21 : x
  2. Step 2: Convert to fraction form
    81,456.12/112,403.77 = 45,157.21/x
  3. Step 3: Cross multiply
    81,456.12x = 112,403.77 × 45,157.21
  4. Step 4: Simplify right side
    81,456.12x = 5,075,840,252.78
  5. Step 5: Solve for x
    x = 5,075,840,252.78/81,456.12
  6. Step 6: Final answer
    x = 62,313.80

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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.