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Finding the Fourth Proportional to 78,473.70, 117,693.54 and 28,555.02

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Solution

The fourth proportional to 78,473.70, 117,693.54 and 28,555.02 is: 42,826.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,473.70 : 117,693.54 = 28,555.02 : x
  2. Step 2: Convert to fraction form
    78,473.70/117,693.54 = 28,555.02/x
  3. Step 3: Cross multiply
    78,473.70x = 117,693.54 × 28,555.02
  4. Step 4: Simplify right side
    78,473.70x = 3,360,741,388.57
  5. Step 5: Solve for x
    x = 3,360,741,388.57/78,473.70
  6. Step 6: Final answer
    x = 42,826.34

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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.