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Finding the Fourth Proportional to 315,008.52, 472,709.43 and 128,020.02

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Solution

The fourth proportional to 315,008.52, 472,709.43 and 128,020.02 is: 192,109.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,008.52 : 472,709.43 = 128,020.02 : x
  2. Step 2: Convert to fraction form
    315,008.52/472,709.43 = 128,020.02/x
  3. Step 3: Cross multiply
    315,008.52x = 472,709.43 × 128,020.02
  4. Step 4: Simplify right side
    315,008.52x = 60,516,270,682.79
  5. Step 5: Solve for x
    x = 60,516,270,682.79/315,008.52
  6. Step 6: Final answer
    x = 192,109.95

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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.