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Finding the Fourth Proportional to 123,396.92, 170,346.95 and 78,096.86

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Solution

The fourth proportional to 123,396.92, 170,346.95 and 78,096.86 is: 107,811.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,396.92 : 170,346.95 = 78,096.86 : x
  2. Step 2: Convert to fraction form
    123,396.92/170,346.95 = 78,096.86/x
  3. Step 3: Cross multiply
    123,396.92x = 170,346.95 × 78,096.86
  4. Step 4: Simplify right side
    123,396.92x = 13,303,560,663.36
  5. Step 5: Solve for x
    x = 13,303,560,663.36/123,396.92
  6. Step 6: Final answer
    x = 107,811.13

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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.