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Finding the Fourth Proportional to 91,147.80, 136,769.71 and 46,774.55

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Solution

The fourth proportional to 91,147.80, 136,769.71 and 46,774.55 is: 70,186.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,147.80 : 136,769.71 = 46,774.55 : x
  2. Step 2: Convert to fraction form
    91,147.80/136,769.71 = 46,774.55/x
  3. Step 3: Cross multiply
    91,147.80x = 136,769.71 × 46,774.55
  4. Step 4: Simplify right side
    91,147.80x = 6,397,341,638.88
  5. Step 5: Solve for x
    x = 6,397,341,638.88/91,147.80
  6. Step 6: Final answer
    x = 70,186.46

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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.