Home / 138,905.52-191,685.69-81,543.92

Finding the Fourth Proportional to 138,905.52, 191,685.69 and 81,543.92

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Solution

The fourth proportional to 138,905.52, 191,685.69 and 81,543.92 is: 112,528.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,905.52 : 191,685.69 = 81,543.92 : x
  2. Step 2: Convert to fraction form
    138,905.52/191,685.69 = 81,543.92/x
  3. Step 3: Cross multiply
    138,905.52x = 191,685.69 × 81,543.92
  4. Step 4: Simplify right side
    138,905.52x = 15,630,802,570.50
  5. Step 5: Solve for x
    x = 15,630,802,570.50/138,905.52
  6. Step 6: Final answer
    x = 112,528.30

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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.