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Finding the Fourth Proportional to 207,885.78, 286,926.89 and 131,356.28

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Solution

The fourth proportional to 207,885.78, 286,926.89 and 131,356.28 is: 181,299.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,885.78 : 286,926.89 = 131,356.28 : x
  2. Step 2: Convert to fraction form
    207,885.78/286,926.89 = 131,356.28/x
  3. Step 3: Cross multiply
    207,885.78x = 286,926.89 × 131,356.28
  4. Step 4: Simplify right side
    207,885.78x = 37,689,648,962.91
  5. Step 5: Solve for x
    x = 37,689,648,962.91/207,885.78
  6. Step 6: Final answer
    x = 181,299.79

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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.