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Finding the Fourth Proportional to 113,559.60, 156,712.28 and 65,840.64

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Solution

The fourth proportional to 113,559.60, 156,712.28 and 65,840.64 is: 90,860.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,559.60 : 156,712.28 = 65,840.64 : x
  2. Step 2: Convert to fraction form
    113,559.60/156,712.28 = 65,840.64/x
  3. Step 3: Cross multiply
    113,559.60x = 156,712.28 × 65,840.64
  4. Step 4: Simplify right side
    113,559.60x = 10,318,036,811.06
  5. Step 5: Solve for x
    x = 10,318,036,811.06/113,559.60
  6. Step 6: Final answer
    x = 90,860.10

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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.