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Finding the Fourth Proportional to 260,076.30, 390,114.45 and 73,087.80

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Solution

The fourth proportional to 260,076.30, 390,114.45 and 73,087.80 is: 109,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,076.30 : 390,114.45 = 73,087.80 : x
  2. Step 2: Convert to fraction form
    260,076.30/390,114.45 = 73,087.80/x
  3. Step 3: Cross multiply
    260,076.30x = 390,114.45 × 73,087.80
  4. Step 4: Simplify right side
    260,076.30x = 28,512,606,898.71
  5. Step 5: Solve for x
    x = 28,512,606,898.71/260,076.30
  6. Step 6: Final answer
    x = 109,631.70

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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.