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Finding the Fourth Proportional to 260,042.60, 390,030.42 and 82,551.62

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Solution

The fourth proportional to 260,042.60, 390,030.42 and 82,551.62 is: 123,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,042.60 : 390,030.42 = 82,551.62 : x
  2. Step 2: Convert to fraction form
    260,042.60/390,030.42 = 82,551.62/x
  3. Step 3: Cross multiply
    260,042.60x = 390,030.42 × 82,551.62
  4. Step 4: Simplify right side
    260,042.60x = 32,197,643,020.28
  5. Step 5: Solve for x
    x = 32,197,643,020.28/260,042.60
  6. Step 6: Final answer
    x = 123,816.80

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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.