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Finding the Fourth Proportional to 260,975.60, 391,463.40 and 73,988.72

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Solution

The fourth proportional to 260,975.60, 391,463.40 and 73,988.72 is: 110,983.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,975.60 : 391,463.40 = 73,988.72 : x
  2. Step 2: Convert to fraction form
    260,975.60/391,463.40 = 73,988.72/x
  3. Step 3: Cross multiply
    260,975.60x = 391,463.40 × 73,988.72
  4. Step 4: Simplify right side
    260,975.60x = 28,963,875,892.85
  5. Step 5: Solve for x
    x = 28,963,875,892.85/260,975.60
  6. Step 6: Final answer
    x = 110,983.08

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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.