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Finding the Fourth Proportional to 61,139.94, 84,388.12 and 37,279.76

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Solution

The fourth proportional to 61,139.94, 84,388.12 and 37,279.76 is: 51,455.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,139.94 : 84,388.12 = 37,279.76 : x
  2. Step 2: Convert to fraction form
    61,139.94/84,388.12 = 37,279.76/x
  3. Step 3: Cross multiply
    61,139.94x = 84,388.12 × 37,279.76
  4. Step 4: Simplify right side
    61,139.94x = 3,145,968,860.45
  5. Step 5: Solve for x
    x = 3,145,968,860.45/61,139.94
  6. Step 6: Final answer
    x = 51,455.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.