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Finding the Fourth Proportional to 66,616.86, 91,931.50 and 36,402.18

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Solution

The fourth proportional to 66,616.86, 91,931.50 and 36,402.18 is: 50,235.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,616.86 : 91,931.50 = 36,402.18 : x
  2. Step 2: Convert to fraction form
    66,616.86/91,931.50 = 36,402.18/x
  3. Step 3: Cross multiply
    66,616.86x = 91,931.50 × 36,402.18
  4. Step 4: Simplify right side
    66,616.86x = 3,346,507,124.43
  5. Step 5: Solve for x
    x = 3,346,507,124.43/66,616.86
  6. Step 6: Final answer
    x = 50,235.14

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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.