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Finding the Fourth Proportional to 138,903.52, 191,682.93 and 81,541.92

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Solution

The fourth proportional to 138,903.52, 191,682.93 and 81,541.92 is: 112,525.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,903.52 : 191,682.93 = 81,541.92 : x
  2. Step 2: Convert to fraction form
    138,903.52/191,682.93 = 81,541.92/x
  3. Step 3: Cross multiply
    138,903.52x = 191,682.93 × 81,541.92
  4. Step 4: Simplify right side
    138,903.52x = 15,630,194,862.24
  5. Step 5: Solve for x
    x = 15,630,194,862.24/138,903.52
  6. Step 6: Final answer
    x = 112,525.55

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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.