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Finding the Fourth Proportional to 78,866.40, 118,344.96 and 43,803.12

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Solution

The fourth proportional to 78,866.40, 118,344.96 and 43,803.12 is: 65,729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,866.40 : 118,344.96 = 43,803.12 : x
  2. Step 2: Convert to fraction form
    78,866.40/118,344.96 = 43,803.12/x
  3. Step 3: Cross multiply
    78,866.40x = 118,344.96 × 43,803.12
  4. Step 4: Simplify right side
    78,866.40x = 5,183,878,484.28
  5. Step 5: Solve for x
    x = 5,183,878,484.28/78,866.40
  6. Step 6: Final answer
    x = 65,729.87

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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.