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Finding the Fourth Proportional to 128,303.30, 192,629.48 and 72,182.90

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Solution

The fourth proportional to 128,303.30, 192,629.48 and 72,182.90 is: 108,372.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303.30 : 192,629.48 = 72,182.90 : x
  2. Step 2: Convert to fraction form
    128,303.30/192,629.48 = 72,182.90/x
  3. Step 3: Cross multiply
    128,303.30x = 192,629.48 × 72,182.90
  4. Step 4: Simplify right side
    128,303.30x = 13,904,553,167.83
  5. Step 5: Solve for x
    x = 13,904,553,167.83/128,303.30
  6. Step 6: Final answer
    x = 108,372.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.