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Finding the Fourth Proportional to 128,684.70, 192,892.32 and 53,847.72

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Solution

The fourth proportional to 128,684.70, 192,892.32 and 53,847.72 is: 80,715.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,684.70 : 192,892.32 = 53,847.72 : x
  2. Step 2: Convert to fraction form
    128,684.70/192,892.32 = 53,847.72/x
  3. Step 3: Cross multiply
    128,684.70x = 192,892.32 × 53,847.72
  4. Step 4: Simplify right side
    128,684.70x = 10,386,811,637.51
  5. Step 5: Solve for x
    x = 10,386,811,637.51/128,684.70
  6. Step 6: Final answer
    x = 80,715.20

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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.