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Finding the Fourth Proportional to 98,543.61, 147,993.60 and 91,039.10

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Solution

The fourth proportional to 98,543.61, 147,993.60 and 91,039.10 is: 136,723.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,543.61 : 147,993.60 = 91,039.10 : x
  2. Step 2: Convert to fraction form
    98,543.61/147,993.60 = 91,039.10/x
  3. Step 3: Cross multiply
    98,543.61x = 147,993.60 × 91,039.10
  4. Step 4: Simplify right side
    98,543.61x = 13,473,203,409.79
  5. Step 5: Solve for x
    x = 13,473,203,409.79/98,543.61
  6. Step 6: Final answer
    x = 136,723.26

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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.