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Finding the Fourth Proportional to 149,356.71, 206,313.68 and 138,727.89

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Solution

The fourth proportional to 149,356.71, 206,313.68 and 138,727.89 is: 191,631.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,356.71 : 206,313.68 = 138,727.89 : x
  2. Step 2: Convert to fraction form
    149,356.71/206,313.68 = 138,727.89/x
  3. Step 3: Cross multiply
    149,356.71x = 206,313.68 × 138,727.89
  4. Step 4: Simplify right side
    149,356.71x = 28,621,461,851.35
  5. Step 5: Solve for x
    x = 28,621,461,851.35/149,356.71
  6. Step 6: Final answer
    x = 191,631.58

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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.