Home / 81,643.12-112,647.79-47,632.19

Finding the Fourth Proportional to 81,643.12, 112,647.79 and 47,632.19

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Solution

The fourth proportional to 81,643.12, 112,647.79 and 47,632.19 is: 65,720.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,643.12 : 112,647.79 = 47,632.19 : x
  2. Step 2: Convert to fraction form
    81,643.12/112,647.79 = 47,632.19/x
  3. Step 3: Cross multiply
    81,643.12x = 112,647.79 × 47,632.19
  4. Step 4: Simplify right side
    81,643.12x = 5,365,661,098.90
  5. Step 5: Solve for x
    x = 5,365,661,098.90/81,643.12
  6. Step 6: Final answer
    x = 65,720.92

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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.