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Finding the Fourth Proportional to 103,980.70, 155,679.45 and 101,064.70

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Solution

The fourth proportional to 103,980.70, 155,679.45 and 101,064.70 is: 151,313.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,980.70 : 155,679.45 = 101,064.70 : x
  2. Step 2: Convert to fraction form
    103,980.70/155,679.45 = 101,064.70/x
  3. Step 3: Cross multiply
    103,980.70x = 155,679.45 × 101,064.70
  4. Step 4: Simplify right side
    103,980.70x = 15,733,696,910.42
  5. Step 5: Solve for x
    x = 15,733,696,910.42/103,980.70
  6. Step 6: Final answer
    x = 151,313.63

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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.