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Finding the Fourth Proportional to 128,103.32, 176,834.69 and 82,785.03

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Solution

The fourth proportional to 128,103.32, 176,834.69 and 82,785.03 is: 114,277.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,103.32 : 176,834.69 = 82,785.03 : x
  2. Step 2: Convert to fraction form
    128,103.32/176,834.69 = 82,785.03/x
  3. Step 3: Cross multiply
    128,103.32x = 176,834.69 × 82,785.03
  4. Step 4: Simplify right side
    128,103.32x = 14,639,264,702.77
  5. Step 5: Solve for x
    x = 14,639,264,702.77/128,103.32
  6. Step 6: Final answer
    x = 114,277.02

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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.