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Finding the Fourth Proportional to 365,128.80, 547,710.12 and 112,420.61

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Solution

The fourth proportional to 365,128.80, 547,710.12 and 112,420.61 is: 168,636.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,128.80 : 547,710.12 = 112,420.61 : x
  2. Step 2: Convert to fraction form
    365,128.80/547,710.12 = 112,420.61/x
  3. Step 3: Cross multiply
    365,128.80x = 547,710.12 × 112,420.61
  4. Step 4: Simplify right side
    365,128.80x = 61,573,905,793.57
  5. Step 5: Solve for x
    x = 61,573,905,793.57/365,128.80
  6. Step 6: Final answer
    x = 168,636.12

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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.