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Finding the Fourth Proportional to 78,325.83, 117,450.18 and 28,398.47

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Solution

The fourth proportional to 78,325.83, 117,450.18 and 28,398.47 is: 42,583.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,325.83 : 117,450.18 = 28,398.47 : x
  2. Step 2: Convert to fraction form
    78,325.83/117,450.18 = 28,398.47/x
  3. Step 3: Cross multiply
    78,325.83x = 117,450.18 × 28,398.47
  4. Step 4: Simplify right side
    78,325.83x = 3,335,404,825.97
  5. Step 5: Solve for x
    x = 3,335,404,825.97/78,325.83
  6. Step 6: Final answer
    x = 42,583.72

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1.5x scale

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.