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Finding the Fourth Proportional to 101,307.79, 151,825.85 and 78,845.59

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Solution

The fourth proportional to 101,307.79, 151,825.85 and 78,845.59 is: 118,162.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,307.79 : 151,825.85 = 78,845.59 : x
  2. Step 2: Convert to fraction form
    101,307.79/151,825.85 = 78,845.59/x
  3. Step 3: Cross multiply
    101,307.79x = 151,825.85 × 78,845.59
  4. Step 4: Simplify right side
    101,307.79x = 11,970,798,720.50
  5. Step 5: Solve for x
    x = 11,970,798,720.50/101,307.79
  6. Step 6: Final answer
    x = 118,162.67

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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.