Home / 113,540.40-156,678.84-65,785.44

Finding the Fourth Proportional to 113,540.40, 156,678.84 and 65,785.44

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Solution

The fourth proportional to 113,540.40, 156,678.84 and 65,785.44 is: 90,779.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,540.40 : 156,678.84 = 65,785.44 : x
  2. Step 2: Convert to fraction form
    113,540.40/156,678.84 = 65,785.44/x
  3. Step 3: Cross multiply
    113,540.40x = 156,678.84 × 65,785.44
  4. Step 4: Simplify right side
    113,540.40x = 10,307,186,428.09
  5. Step 5: Solve for x
    x = 10,307,186,428.09/113,540.40
  6. Step 6: Final answer
    x = 90,779.90

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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.