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Finding the Fourth Proportional to 85,348.49, 128,012.64 and 53,664.98

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Solution

The fourth proportional to 85,348.49, 128,012.64 and 53,664.98 is: 80,491.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,348.49 : 128,012.64 = 53,664.98 : x
  2. Step 2: Convert to fraction form
    85,348.49/128,012.64 = 53,664.98/x
  3. Step 3: Cross multiply
    85,348.49x = 128,012.64 × 53,664.98
  4. Step 4: Simplify right side
    85,348.49x = 6,869,795,765.35
  5. Step 5: Solve for x
    x = 6,869,795,765.35/85,348.49
  6. Step 6: Final answer
    x = 80,491.12

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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.