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Finding the Fourth Proportional to 228,787.98, 315,726.51 and 128,185.74

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Solution

The fourth proportional to 228,787.98, 315,726.51 and 128,185.74 is: 176,895.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,787.98 : 315,726.51 = 128,185.74 : x
  2. Step 2: Convert to fraction form
    228,787.98/315,726.51 = 128,185.74/x
  3. Step 3: Cross multiply
    228,787.98x = 315,726.51 × 128,185.74
  4. Step 4: Simplify right side
    228,787.98x = 40,471,636,321.97
  5. Step 5: Solve for x
    x = 40,471,636,321.97/228,787.98
  6. Step 6: Final answer
    x = 176,895.82

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1.5x scale

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.