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Finding the Fourth Proportional to 68,533.50, 102,810.47 and 21,144.66

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Solution

The fourth proportional to 68,533.50, 102,810.47 and 21,144.66 is: 31,720.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,533.50 : 102,810.47 = 21,144.66 : x
  2. Step 2: Convert to fraction form
    68,533.50/102,810.47 = 21,144.66/x
  3. Step 3: Cross multiply
    68,533.50x = 102,810.47 × 21,144.66
  4. Step 4: Simplify right side
    68,533.50x = 2,173,892,432.59
  5. Step 5: Solve for x
    x = 2,173,892,432.59/68,533.50
  6. Step 6: Final answer
    x = 31,720.14

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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.