Home / 138,797.28-191,533.01-81,428.63

Finding the Fourth Proportional to 138,797.28, 191,533.01 and 81,428.63

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Solution

The fourth proportional to 138,797.28, 191,533.01 and 81,428.63 is: 112,367.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,797.28 : 191,533.01 = 81,428.63 : x
  2. Step 2: Convert to fraction form
    138,797.28/191,533.01 = 81,428.63/x
  3. Step 3: Cross multiply
    138,797.28x = 191,533.01 × 81,428.63
  4. Step 4: Simplify right side
    138,797.28x = 15,596,269,239.27
  5. Step 5: Solve for x
    x = 15,596,269,239.27/138,797.28
  6. Step 6: Final answer
    x = 112,367.25

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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.