Home / 138,913.83-191,701.34-81,542.04

Finding the Fourth Proportional to 138,913.83, 191,701.34 and 81,542.04

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Solution

The fourth proportional to 138,913.83, 191,701.34 and 81,542.04 is: 112,528.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,913.83 : 191,701.34 = 81,542.04 : x
  2. Step 2: Convert to fraction form
    138,913.83/191,701.34 = 81,542.04/x
  3. Step 3: Cross multiply
    138,913.83x = 191,701.34 × 81,542.04
  4. Step 4: Simplify right side
    138,913.83x = 15,631,717,926.62
  5. Step 5: Solve for x
    x = 15,631,717,926.62/138,913.83
  6. Step 6: Final answer
    x = 112,528.16

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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.