Home / 78,961.17-118,449.36-31,564.95

Finding the Fourth Proportional to 78,961.17, 118,449.36 and 31,564.95

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Solution

The fourth proportional to 78,961.17, 118,449.36 and 31,564.95 is: 47,350.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,961.17 : 118,449.36 = 31,564.95 : x
  2. Step 2: Convert to fraction form
    78,961.17/118,449.36 = 31,564.95/x
  3. Step 3: Cross multiply
    78,961.17x = 118,449.36 × 31,564.95
  4. Step 4: Simplify right side
    78,961.17x = 3,738,848,125.93
  5. Step 5: Solve for x
    x = 3,738,848,125.93/78,961.17
  6. Step 6: Final answer
    x = 47,350.47

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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.