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Finding the Fourth Proportional to 129,168.16, 193,827.12 and 54,282.40

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Solution

The fourth proportional to 129,168.16, 193,827.12 and 54,282.40 is: 81,455.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,168.16 : 193,827.12 = 54,282.40 : x
  2. Step 2: Convert to fraction form
    129,168.16/193,827.12 = 54,282.40/x
  3. Step 3: Cross multiply
    129,168.16x = 193,827.12 × 54,282.40
  4. Step 4: Simplify right side
    129,168.16x = 10,521,401,258.69
  5. Step 5: Solve for x
    x = 10,521,401,258.69/129,168.16
  6. Step 6: Final answer
    x = 81,455.07

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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.