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Finding the Fourth Proportional to 104,378.64, 156,596.19 and 74,430.70

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Solution

The fourth proportional to 104,378.64, 156,596.19 and 74,430.70 is: 111,666.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,378.64 : 156,596.19 = 74,430.70 : x
  2. Step 2: Convert to fraction form
    104,378.64/156,596.19 = 74,430.70/x
  3. Step 3: Cross multiply
    104,378.64x = 156,596.19 × 74,430.70
  4. Step 4: Simplify right side
    104,378.64x = 11,655,564,039.03
  5. Step 5: Solve for x
    x = 11,655,564,039.03/104,378.64
  6. Step 6: Final answer
    x = 111,666.18

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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.