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Finding the Fourth Proportional to 52,605.40, 78,893.70 and 21,443.80

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Solution

The fourth proportional to 52,605.40, 78,893.70 and 21,443.80 is: 32,159.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,605.40 : 78,893.70 = 21,443.80 : x
  2. Step 2: Convert to fraction form
    52,605.40/78,893.70 = 21,443.80/x
  3. Step 3: Cross multiply
    52,605.40x = 78,893.70 × 21,443.80
  4. Step 4: Simplify right side
    52,605.40x = 1,691,780,724.06
  5. Step 5: Solve for x
    x = 1,691,780,724.06/52,605.40
  6. Step 6: Final answer
    x = 32,159.83

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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.