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Finding the Fourth Proportional to 265,968.64, 398,884.80 and 78,937.60

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Solution

The fourth proportional to 265,968.64, 398,884.80 and 78,937.60 is: 118,386.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,968.64 : 398,884.80 = 78,937.60 : x
  2. Step 2: Convert to fraction form
    265,968.64/398,884.80 = 78,937.60/x
  3. Step 3: Cross multiply
    265,968.64x = 398,884.80 × 78,937.60
  4. Step 4: Simplify right side
    265,968.64x = 31,487,008,788.48
  5. Step 5: Solve for x
    x = 31,487,008,788.48/265,968.64
  6. Step 6: Final answer
    x = 118,386.17

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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.