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Finding the Fourth Proportional to 78,056.88, 117,037.86 and 30,615.12

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Solution

The fourth proportional to 78,056.88, 117,037.86 and 30,615.12 is: 45,904.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,056.88 : 117,037.86 = 30,615.12 : x
  2. Step 2: Convert to fraction form
    78,056.88/117,037.86 = 30,615.12/x
  3. Step 3: Cross multiply
    78,056.88x = 117,037.86 × 30,615.12
  4. Step 4: Simplify right side
    78,056.88x = 3,583,128,128.44
  5. Step 5: Solve for x
    x = 3,583,128,128.44/78,056.88
  6. Step 6: Final answer
    x = 45,904.07

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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.