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Finding the Fourth Proportional to 78,900.40, 118,350.60 and 19,736.07

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Solution

The fourth proportional to 78,900.40, 118,350.60 and 19,736.07 is: 29,604.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,900.40 : 118,350.60 = 19,736.07 : x
  2. Step 2: Convert to fraction form
    78,900.40/118,350.60 = 19,736.07/x
  3. Step 3: Cross multiply
    78,900.40x = 118,350.60 × 19,736.07
  4. Step 4: Simplify right side
    78,900.40x = 2,335,775,726.14
  5. Step 5: Solve for x
    x = 2,335,775,726.14/78,900.40
  6. Step 6: Final answer
    x = 29,604.11

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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.