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Finding the Fourth Proportional to 156,330, 215,913.60 and 105,941.52

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Solution

The fourth proportional to 156,330, 215,913.60 and 105,941.52 is: 146,320.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,330 : 215,913.60 = 105,941.52 : x
  2. Step 2: Convert to fraction form
    156,330/215,913.60 = 105,941.52/x
  3. Step 3: Cross multiply
    156,330x = 215,913.60 × 105,941.52
  4. Step 4: Simplify right side
    156,330x = 22,874,214,972.67
  5. Step 5: Solve for x
    x = 22,874,214,972.67/156,330
  6. Step 6: Final answer
    x = 146,320.06

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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.