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Finding the Fourth Proportional to 260,116.53, 390,200.78 and 70,579.90

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Solution

The fourth proportional to 260,116.53, 390,200.78 and 70,579.90 is: 105,876.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,116.53 : 390,200.78 = 70,579.90 : x
  2. Step 2: Convert to fraction form
    260,116.53/390,200.78 = 70,579.90/x
  3. Step 3: Cross multiply
    260,116.53x = 390,200.78 × 70,579.90
  4. Step 4: Simplify right side
    260,116.53x = 27,540,332,032.32
  5. Step 5: Solve for x
    x = 27,540,332,032.32/260,116.53
  6. Step 6: Final answer
    x = 105,876.90

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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.