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Finding the Fourth Proportional to 156,911.70, 235,367.55 and 145,391.70

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Solution

The fourth proportional to 156,911.70, 235,367.55 and 145,391.70 is: 218,087.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,911.70 : 235,367.55 = 145,391.70 : x
  2. Step 2: Convert to fraction form
    156,911.70/235,367.55 = 145,391.70/x
  3. Step 3: Cross multiply
    156,911.70x = 235,367.55 × 145,391.70
  4. Step 4: Simplify right side
    156,911.70x = 34,220,488,219.34
  5. Step 5: Solve for x
    x = 34,220,488,219.34/156,911.70
  6. Step 6: Final answer
    x = 218,087.55

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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.