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Finding the Fourth Proportional to 128,684.96, 192,980 and 44,423.68

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Solution

The fourth proportional to 128,684.96, 192,980 and 44,423.68 is: 66,619.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,684.96 : 192,980 = 44,423.68 : x
  2. Step 2: Convert to fraction form
    128,684.96/192,980 = 44,423.68/x
  3. Step 3: Cross multiply
    128,684.96x = 192,980 × 44,423.68
  4. Step 4: Simplify right side
    128,684.96x = 8,572,881,766.40
  5. Step 5: Solve for x
    x = 8,572,881,766.40/128,684.96
  6. Step 6: Final answer
    x = 66,619.14

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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.