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Finding the Fourth Proportional to 201,539.50, 278,124.78 and 112,115.50

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Solution

The fourth proportional to 201,539.50, 278,124.78 and 112,115.50 is: 154,719.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,539.50 : 278,124.78 = 112,115.50 : x
  2. Step 2: Convert to fraction form
    201,539.50/278,124.78 = 112,115.50/x
  3. Step 3: Cross multiply
    201,539.50x = 278,124.78 × 112,115.50
  4. Step 4: Simplify right side
    201,539.50x = 31,182,098,772.09
  5. Step 5: Solve for x
    x = 31,182,098,772.09/201,539.50
  6. Step 6: Final answer
    x = 154,719.54

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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.