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Finding the Fourth Proportional to 65,586.60, 90,461.57 and 42,889.19

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Solution

The fourth proportional to 65,586.60, 90,461.57 and 42,889.19 is: 59,155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,586.60 : 90,461.57 = 42,889.19 : x
  2. Step 2: Convert to fraction form
    65,586.60/90,461.57 = 42,889.19/x
  3. Step 3: Cross multiply
    65,586.60x = 90,461.57 × 42,889.19
  4. Step 4: Simplify right side
    65,586.60x = 3,879,822,796.67
  5. Step 5: Solve for x
    x = 3,879,822,796.67/65,586.60
  6. Step 6: Final answer
    x = 59,155.72

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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.