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Finding the Fourth Proportional to 138,039.19, 207,107.38 and 67,967.71

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Solution

The fourth proportional to 138,039.19, 207,107.38 and 67,967.71 is: 101,975.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,039.19 : 207,107.38 = 67,967.71 : x
  2. Step 2: Convert to fraction form
    138,039.19/207,107.38 = 67,967.71/x
  3. Step 3: Cross multiply
    138,039.19x = 207,107.38 × 67,967.71
  4. Step 4: Simplify right side
    138,039.19x = 14,076,613,909.89
  5. Step 5: Solve for x
    x = 14,076,613,909.89/138,039.19
  6. Step 6: Final answer
    x = 101,975.49

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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.