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Finding the Fourth Proportional to 52,490.70, 78,736.05 and 21,348.30

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Solution

The fourth proportional to 52,490.70, 78,736.05 and 21,348.30 is: 32,022.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,490.70 : 78,736.05 = 21,348.30 : x
  2. Step 2: Convert to fraction form
    52,490.70/78,736.05 = 21,348.30/x
  3. Step 3: Cross multiply
    52,490.70x = 78,736.05 × 21,348.30
  4. Step 4: Simplify right side
    52,490.70x = 1,680,880,816.22
  5. Step 5: Solve for x
    x = 1,680,880,816.22/52,490.70
  6. Step 6: Final answer
    x = 32,022.45

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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.