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Finding the Fourth Proportional to 128,060.94, 176,783.90 and 74,335.61

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Solution

The fourth proportional to 128,060.94, 176,783.90 and 74,335.61 is: 102,617.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,060.94 : 176,783.90 = 74,335.61 : x
  2. Step 2: Convert to fraction form
    128,060.94/176,783.90 = 74,335.61/x
  3. Step 3: Cross multiply
    128,060.94x = 176,783.90 × 74,335.61
  4. Step 4: Simplify right side
    128,060.94x = 13,141,339,363.56
  5. Step 5: Solve for x
    x = 13,141,339,363.56/128,060.94
  6. Step 6: Final answer
    x = 102,617.86

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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.