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Finding the Fourth Proportional to 138,203.58, 207,320.18 and 38,364.20

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Solution

The fourth proportional to 138,203.58, 207,320.18 and 38,364.20 is: 57,550.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,203.58 : 207,320.18 = 38,364.20 : x
  2. Step 2: Convert to fraction form
    138,203.58/207,320.18 = 38,364.20/x
  3. Step 3: Cross multiply
    138,203.58x = 207,320.18 × 38,364.20
  4. Step 4: Simplify right side
    138,203.58x = 7,953,672,849.56
  5. Step 5: Solve for x
    x = 7,953,672,849.56/138,203.58
  6. Step 6: Final answer
    x = 57,550.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.