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Finding the Fourth Proportional to 92,100.80, 126,983.76 and 77,015.36

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Solution

The fourth proportional to 92,100.80, 126,983.76 and 77,015.36 is: 106,184.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,100.80 : 126,983.76 = 77,015.36 : x
  2. Step 2: Convert to fraction form
    92,100.80/126,983.76 = 77,015.36/x
  3. Step 3: Cross multiply
    92,100.80x = 126,983.76 × 77,015.36
  4. Step 4: Simplify right side
    92,100.80x = 9,779,699,990.55
  5. Step 5: Solve for x
    x = 9,779,699,990.55/92,100.80
  6. Step 6: Final answer
    x = 106,184.75

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1.5x scale

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.