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Finding the Fourth Proportional to 78,355.51, 117,551.50 and 62,405.44

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Solution

The fourth proportional to 78,355.51, 117,551.50 and 62,405.44 is: 93,622.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,355.51 : 117,551.50 = 62,405.44 : x
  2. Step 2: Convert to fraction form
    78,355.51/117,551.50 = 62,405.44/x
  3. Step 3: Cross multiply
    78,355.51x = 117,551.50 × 62,405.44
  4. Step 4: Simplify right side
    78,355.51x = 7,335,852,630.27
  5. Step 5: Solve for x
    x = 7,335,852,630.27/78,355.51
  6. Step 6: Final answer
    x = 93,622.68

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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.