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Finding the Fourth Proportional to 265,735.03, 398,603.99 and 78,748.15

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Solution

The fourth proportional to 265,735.03, 398,603.99 and 78,748.15 is: 118,122.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,735.03 : 398,603.99 = 78,748.15 : x
  2. Step 2: Convert to fraction form
    265,735.03/398,603.99 = 78,748.15/x
  3. Step 3: Cross multiply
    265,735.03x = 398,603.99 × 78,748.15
  4. Step 4: Simplify right side
    265,735.03x = 31,389,326,795.12
  5. Step 5: Solve for x
    x = 31,389,326,795.12/265,735.03
  6. Step 6: Final answer
    x = 118,122.65

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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.