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Finding the Fourth Proportional to 129,085.44, 178,270.08 and 88,903.68

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Solution

The fourth proportional to 129,085.44, 178,270.08 and 88,903.68 is: 122,778.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,085.44 : 178,270.08 = 88,903.68 : x
  2. Step 2: Convert to fraction form
    129,085.44/178,270.08 = 88,903.68/x
  3. Step 3: Cross multiply
    129,085.44x = 178,270.08 × 88,903.68
  4. Step 4: Simplify right side
    129,085.44x = 15,848,866,145.89
  5. Step 5: Solve for x
    x = 15,848,866,145.89/129,085.44
  6. Step 6: Final answer
    x = 122,778.11

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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.