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Finding the Fourth Proportional to 65,781.58, 98,688.58 and 19,039.18

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Solution

The fourth proportional to 65,781.58, 98,688.58 and 19,039.18 is: 28,563.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,781.58 : 98,688.58 = 19,039.18 : x
  2. Step 2: Convert to fraction form
    65,781.58/98,688.58 = 19,039.18/x
  3. Step 3: Cross multiply
    65,781.58x = 98,688.58 × 19,039.18
  4. Step 4: Simplify right side
    65,781.58x = 1,878,949,638.56
  5. Step 5: Solve for x
    x = 1,878,949,638.56/65,781.58
  6. Step 6: Final answer
    x = 28,563.46

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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.