Home / 78,216.88-117,325.26-28,285.28

Finding the Fourth Proportional to 78,216.88, 117,325.26 and 28,285.28

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Solution

The fourth proportional to 78,216.88, 117,325.26 and 28,285.28 is: 42,427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,216.88 : 117,325.26 = 28,285.28 : x
  2. Step 2: Convert to fraction form
    78,216.88/117,325.26 = 28,285.28/x
  3. Step 3: Cross multiply
    78,216.88x = 117,325.26 × 28,285.28
  4. Step 4: Simplify right side
    78,216.88x = 3,318,577,830.17
  5. Step 5: Solve for x
    x = 3,318,577,830.17/78,216.88
  6. Step 6: Final answer
    x = 42,427.90

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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.