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Finding the Fourth Proportional to 156,543.70, 234,945.15 and 72,433.30

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Solution

The fourth proportional to 156,543.70, 234,945.15 and 72,433.30 is: 108,709.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,543.70 : 234,945.15 = 72,433.30 : x
  2. Step 2: Convert to fraction form
    156,543.70/234,945.15 = 72,433.30/x
  3. Step 3: Cross multiply
    156,543.70x = 234,945.15 × 72,433.30
  4. Step 4: Simplify right side
    156,543.70x = 17,017,852,533.50
  5. Step 5: Solve for x
    x = 17,017,852,533.50/156,543.70
  6. Step 6: Final answer
    x = 108,709.92

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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.