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Finding the Fourth Proportional to 128,398.80, 192,560.59 and 48,379.04

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Solution

The fourth proportional to 128,398.80, 192,560.59 and 48,379.04 is: 72,554.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,398.80 : 192,560.59 = 48,379.04 : x
  2. Step 2: Convert to fraction form
    128,398.80/192,560.59 = 48,379.04/x
  3. Step 3: Cross multiply
    128,398.80x = 192,560.59 × 48,379.04
  4. Step 4: Simplify right side
    128,398.80x = 9,315,896,305.81
  5. Step 5: Solve for x
    x = 9,315,896,305.81/128,398.80
  6. Step 6: Final answer
    x = 72,554.39

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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.