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Finding the Fourth Proportional to 66,403.50, 91,638.15 and 36,188.70

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Solution

The fourth proportional to 66,403.50, 91,638.15 and 36,188.70 is: 49,941.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,403.50 : 91,638.15 = 36,188.70 : x
  2. Step 2: Convert to fraction form
    66,403.50/91,638.15 = 36,188.70/x
  3. Step 3: Cross multiply
    66,403.50x = 91,638.15 × 36,188.70
  4. Step 4: Simplify right side
    66,403.50x = 3,316,265,518.91
  5. Step 5: Solve for x
    x = 3,316,265,518.91/66,403.50
  6. Step 6: Final answer
    x = 49,941.13

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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.