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Finding the Fourth Proportional to 118,085.99, 177,063.98 and 80,688.29

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Solution

The fourth proportional to 118,085.99, 177,063.98 and 80,688.29 is: 120,988.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,085.99 : 177,063.98 = 80,688.29 : x
  2. Step 2: Convert to fraction form
    118,085.99/177,063.98 = 80,688.29/x
  3. Step 3: Cross multiply
    118,085.99x = 177,063.98 × 80,688.29
  4. Step 4: Simplify right side
    118,085.99x = 14,286,988,478.03
  5. Step 5: Solve for x
    x = 14,286,988,478.03/118,085.99
  6. Step 6: Final answer
    x = 120,988.01

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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.