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Finding the Fourth Proportional to 118,782.88, 178,168.08 and 39,898.72

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Solution

The fourth proportional to 118,782.88, 178,168.08 and 39,898.72 is: 59,845.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,782.88 : 178,168.08 = 39,898.72 : x
  2. Step 2: Convert to fraction form
    118,782.88/178,168.08 = 39,898.72/x
  3. Step 3: Cross multiply
    118,782.88x = 178,168.08 × 39,898.72
  4. Step 4: Simplify right side
    118,782.88x = 7,108,678,336.86
  5. Step 5: Solve for x
    x = 7,108,678,336.86/118,782.88
  6. Step 6: Final answer
    x = 59,845.98

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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.