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Finding the Fourth Proportional to 228,925.88, 315,916.72 and 128,323.88

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Solution

The fourth proportional to 228,925.88, 315,916.72 and 128,323.88 is: 177,086.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,925.88 : 315,916.72 = 128,323.88 : x
  2. Step 2: Convert to fraction form
    228,925.88/315,916.72 = 128,323.88/x
  3. Step 3: Cross multiply
    228,925.88x = 315,916.72 × 128,323.88
  4. Step 4: Simplify right side
    228,925.88x = 40,539,659,267.27
  5. Step 5: Solve for x
    x = 40,539,659,267.27/228,925.88
  6. Step 6: Final answer
    x = 177,086.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.