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Finding the Fourth Proportional to 71,436.76, 98,659.74 and 55,709.08

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Solution

The fourth proportional to 71,436.76, 98,659.74 and 55,709.08 is: 76,938.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,436.76 : 98,659.74 = 55,709.08 : x
  2. Step 2: Convert to fraction form
    71,436.76/98,659.74 = 55,709.08/x
  3. Step 3: Cross multiply
    71,436.76x = 98,659.74 × 55,709.08
  4. Step 4: Simplify right side
    71,436.76x = 5,496,243,348.44
  5. Step 5: Solve for x
    x = 5,496,243,348.44/71,436.76
  6. Step 6: Final answer
    x = 76,938.59

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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.