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Finding the Fourth Proportional to 170,806.90, 256,071.88 and 71,041.78

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Solution

The fourth proportional to 170,806.90, 256,071.88 and 71,041.78 is: 106,505.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,806.90 : 256,071.88 = 71,041.78 : x
  2. Step 2: Convert to fraction form
    170,806.90/256,071.88 = 71,041.78/x
  3. Step 3: Cross multiply
    170,806.90x = 256,071.88 × 71,041.78
  4. Step 4: Simplify right side
    170,806.90x = 18,191,801,807.94
  5. Step 5: Solve for x
    x = 18,191,801,807.94/170,806.90
  6. Step 6: Final answer
    x = 106,505.08

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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.