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Finding the Fourth Proportional to 138,632.58, 207,927.18 and 45,137.70

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Solution

The fourth proportional to 138,632.58, 207,927.18 and 45,137.70 is: 67,699.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,632.58 : 207,927.18 = 45,137.70 : x
  2. Step 2: Convert to fraction form
    138,632.58/207,927.18 = 45,137.70/x
  3. Step 3: Cross multiply
    138,632.58x = 207,927.18 × 45,137.70
  4. Step 4: Simplify right side
    138,632.58x = 9,385,354,672.69
  5. Step 5: Solve for x
    x = 9,385,354,672.69/138,632.58
  6. Step 6: Final answer
    x = 67,699.49

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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.