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Finding the Fourth Proportional to 66,295.12, 91,521.12 and 51,153.76

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Solution

The fourth proportional to 66,295.12, 91,521.12 and 51,153.76 is: 70,618.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,295.12 : 91,521.12 = 51,153.76 : x
  2. Step 2: Convert to fraction form
    66,295.12/91,521.12 = 51,153.76/x
  3. Step 3: Cross multiply
    66,295.12x = 91,521.12 × 51,153.76
  4. Step 4: Simplify right side
    66,295.12x = 4,681,649,407.41
  5. Step 5: Solve for x
    x = 4,681,649,407.41/66,295.12
  6. Step 6: Final answer
    x = 70,618.31

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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.