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Finding the Fourth Proportional to 51,620.40, 77,279.40 and 38,530.80

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Solution

The fourth proportional to 51,620.40, 77,279.40 and 38,530.80 is: 57,683.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,620.40 : 77,279.40 = 38,530.80 : x
  2. Step 2: Convert to fraction form
    51,620.40/77,279.40 = 38,530.80/x
  3. Step 3: Cross multiply
    51,620.40x = 77,279.40 × 38,530.80
  4. Step 4: Simplify right side
    51,620.40x = 2,977,637,105.52
  5. Step 5: Solve for x
    x = 2,977,637,105.52/51,620.40
  6. Step 6: Final answer
    x = 57,683.34

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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.