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Finding the Fourth Proportional to 266,346.60, 399,746.70 and 108,688.20

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Solution

The fourth proportional to 266,346.60, 399,746.70 and 108,688.20 is: 163,124.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,346.60 : 399,746.70 = 108,688.20 : x
  2. Step 2: Convert to fraction form
    266,346.60/399,746.70 = 108,688.20/x
  3. Step 3: Cross multiply
    266,346.60x = 399,746.70 × 108,688.20
  4. Step 4: Simplify right side
    266,346.60x = 43,447,749,278.94
  5. Step 5: Solve for x
    x = 43,447,749,278.94/266,346.60
  6. Step 6: Final answer
    x = 163,124.85

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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.