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Finding the Fourth Proportional to 101,173.10, 151,662.45 and 78,671.30

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Solution

The fourth proportional to 101,173.10, 151,662.45 and 78,671.30 is: 117,931.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,173.10 : 151,662.45 = 78,671.30 : x
  2. Step 2: Convert to fraction form
    101,173.10/151,662.45 = 78,671.30/x
  3. Step 3: Cross multiply
    101,173.10x = 151,662.45 × 78,671.30
  4. Step 4: Simplify right side
    101,173.10x = 11,931,482,102.69
  5. Step 5: Solve for x
    x = 11,931,482,102.69/101,173.10
  6. Step 6: Final answer
    x = 117,931.37

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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.