Home / 81,639.90-112,668.10-54,369.23

Finding the Fourth Proportional to 81,639.90, 112,668.10 and 54,369.23

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Solution

The fourth proportional to 81,639.90, 112,668.10 and 54,369.23 is: 75,032.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,639.90 : 112,668.10 = 54,369.23 : x
  2. Step 2: Convert to fraction form
    81,639.90/112,668.10 = 54,369.23/x
  3. Step 3: Cross multiply
    81,639.90x = 112,668.10 × 54,369.23
  4. Step 4: Simplify right side
    81,639.90x = 6,125,677,143.30
  5. Step 5: Solve for x
    x = 6,125,677,143.30/81,639.90
  6. Step 6: Final answer
    x = 75,032.88

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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.