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Finding the Fourth Proportional to 266,110.40, 399,165.60 and 139,701.80

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Solution

The fourth proportional to 266,110.40, 399,165.60 and 139,701.80 is: 209,552.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,110.40 : 399,165.60 = 139,701.80 : x
  2. Step 2: Convert to fraction form
    266,110.40/399,165.60 = 139,701.80/x
  3. Step 3: Cross multiply
    266,110.40x = 399,165.60 × 139,701.80
  4. Step 4: Simplify right side
    266,110.40x = 55,764,152,818.08
  5. Step 5: Solve for x
    x = 55,764,152,818.08/266,110.40
  6. Step 6: Final answer
    x = 209,552.70

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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.