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Finding the Fourth Proportional to 260,112, 390,168.96 and 63,120

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Solution

The fourth proportional to 260,112, 390,168.96 and 63,120 is: 94,680.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,112 : 390,168.96 = 63,120 : x
  2. Step 2: Convert to fraction form
    260,112/390,168.96 = 63,120/x
  3. Step 3: Cross multiply
    260,112x = 390,168.96 × 63,120
  4. Step 4: Simplify right side
    260,112x = 24,627,464,755.20
  5. Step 5: Solve for x
    x = 24,627,464,755.20/260,112
  6. Step 6: Final answer
    x = 94,680.23

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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.