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Finding the Fourth Proportional to 92,838.55, 128,081.31 and 52,543.07

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Solution

The fourth proportional to 92,838.55, 128,081.31 and 52,543.07 is: 72,489.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,838.55 : 128,081.31 = 52,543.07 : x
  2. Step 2: Convert to fraction form
    92,838.55/128,081.31 = 52,543.07/x
  3. Step 3: Cross multiply
    92,838.55x = 128,081.31 × 52,543.07
  4. Step 4: Simplify right side
    92,838.55x = 6,729,785,237.02
  5. Step 5: Solve for x
    x = 6,729,785,237.02/92,838.55
  6. Step 6: Final answer
    x = 72,489.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.