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Finding the Fourth Proportional to 64,991.88, 89,688.04 and 36,698.76

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Solution

The fourth proportional to 64,991.88, 89,688.04 and 36,698.76 is: 50,643.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,991.88 : 89,688.04 = 36,698.76 : x
  2. Step 2: Convert to fraction form
    64,991.88/89,688.04 = 36,698.76/x
  3. Step 3: Cross multiply
    64,991.88x = 89,688.04 × 36,698.76
  4. Step 4: Simplify right side
    64,991.88x = 3,291,439,854.83
  5. Step 5: Solve for x
    x = 3,291,439,854.83/64,991.88
  6. Step 6: Final answer
    x = 50,643.86

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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.