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Finding the Fourth Proportional to 118,755.84, 178,143.12 and 39,869.76

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Solution

The fourth proportional to 118,755.84, 178,143.12 and 39,869.76 is: 59,807.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,755.84 : 178,143.12 = 39,869.76 : x
  2. Step 2: Convert to fraction form
    118,755.84/178,143.12 = 39,869.76/x
  3. Step 3: Cross multiply
    118,755.84x = 178,143.12 × 39,869.76
  4. Step 4: Simplify right side
    118,755.84x = 7,102,523,440.05
  5. Step 5: Solve for x
    x = 7,102,523,440.05/118,755.84
  6. Step 6: Final answer
    x = 59,807.78

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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.