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Finding the Fourth Proportional to 52,453.80, 78,680.70 and 42,085.80

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Solution

The fourth proportional to 52,453.80, 78,680.70 and 42,085.80 is: 63,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,453.80 : 78,680.70 = 42,085.80 : x
  2. Step 2: Convert to fraction form
    52,453.80/78,680.70 = 42,085.80/x
  3. Step 3: Cross multiply
    52,453.80x = 78,680.70 × 42,085.80
  4. Step 4: Simplify right side
    52,453.80x = 3,311,340,204.06
  5. Step 5: Solve for x
    x = 3,311,340,204.06/52,453.80
  6. Step 6: Final answer
    x = 63,128.70

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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.