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Finding the Fourth Proportional to 113,639.16, 156,821.04 and 61,956.30

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Solution

The fourth proportional to 113,639.16, 156,821.04 and 61,956.30 is: 85,499.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,639.16 : 156,821.04 = 61,956.30 : x
  2. Step 2: Convert to fraction form
    113,639.16/156,821.04 = 61,956.30/x
  3. Step 3: Cross multiply
    113,639.16x = 156,821.04 × 61,956.30
  4. Step 4: Simplify right side
    113,639.16x = 9,716,051,400.55
  5. Step 5: Solve for x
    x = 9,716,051,400.55/113,639.16
  6. Step 6: Final answer
    x = 85,499.15

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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.