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Finding the Fourth Proportional to 78,836.40, 118,300.08 and 43,773.12

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Solution

The fourth proportional to 78,836.40, 118,300.08 and 43,773.12 is: 65,684.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,836.40 : 118,300.08 = 43,773.12 : x
  2. Step 2: Convert to fraction form
    78,836.40/118,300.08 = 43,773.12/x
  3. Step 3: Cross multiply
    78,836.40x = 118,300.08 × 43,773.12
  4. Step 4: Simplify right side
    78,836.40x = 5,178,363,597.85
  5. Step 5: Solve for x
    x = 5,178,363,597.85/78,836.40
  6. Step 6: Final answer
    x = 65,684.93

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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.