Home / 78,390.12-117,602.82-25,797.72

Finding the Fourth Proportional to 78,390.12, 117,602.82 and 25,797.72

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Solution

The fourth proportional to 78,390.12, 117,602.82 and 25,797.72 is: 38,702.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,390.12 : 117,602.82 = 25,797.72 : x
  2. Step 2: Convert to fraction form
    78,390.12/117,602.82 = 25,797.72/x
  3. Step 3: Cross multiply
    78,390.12x = 117,602.82 × 25,797.72
  4. Step 4: Simplify right side
    78,390.12x = 3,033,884,621.57
  5. Step 5: Solve for x
    x = 3,033,884,621.57/78,390.12
  6. Step 6: Final answer
    x = 38,702.39

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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.