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Finding the Fourth Proportional to 78,867.55, 118,202.88 and 39,435.94

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Solution

The fourth proportional to 78,867.55, 118,202.88 and 39,435.94 is: 59,104.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,867.55 : 118,202.88 = 39,435.94 : x
  2. Step 2: Convert to fraction form
    78,867.55/118,202.88 = 39,435.94/x
  3. Step 3: Cross multiply
    78,867.55x = 118,202.88 × 39,435.94
  4. Step 4: Simplify right side
    78,867.55x = 4,661,441,683.51
  5. Step 5: Solve for x
    x = 4,661,441,683.51/78,867.55
  6. Step 6: Final answer
    x = 59,104.68

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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.