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Finding the Fourth Proportional to 118,756.32, 178,143.12 and 39,869.88

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Solution

The fourth proportional to 118,756.32, 178,143.12 and 39,869.88 is: 59,807.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,756.32 : 178,143.12 = 39,869.88 : x
  2. Step 2: Convert to fraction form
    118,756.32/178,143.12 = 39,869.88/x
  3. Step 3: Cross multiply
    118,756.32x = 178,143.12 × 39,869.88
  4. Step 4: Simplify right side
    118,756.32x = 7,102,544,817.23
  5. Step 5: Solve for x
    x = 7,102,544,817.23/118,756.32
  6. Step 6: Final answer
    x = 59,807.72

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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.