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Finding the Fourth Proportional to 73,116.20, 109,803.90 and 56,516.60

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Solution

The fourth proportional to 73,116.20, 109,803.90 and 56,516.60 is: 84,875.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,116.20 : 109,803.90 = 56,516.60 : x
  2. Step 2: Convert to fraction form
    73,116.20/109,803.90 = 56,516.60/x
  3. Step 3: Cross multiply
    73,116.20x = 109,803.90 × 56,516.60
  4. Step 4: Simplify right side
    73,116.20x = 6,205,743,094.74
  5. Step 5: Solve for x
    x = 6,205,743,094.74/73,116.20
  6. Step 6: Final answer
    x = 84,875.08

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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.