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Finding the Fourth Proportional to 100,708.34, 138,754.77 and 73,820.66

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Solution

The fourth proportional to 100,708.34, 138,754.77 and 73,820.66 is: 101,709.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,708.34 : 138,754.77 = 73,820.66 : x
  2. Step 2: Convert to fraction form
    100,708.34/138,754.77 = 73,820.66/x
  3. Step 3: Cross multiply
    100,708.34x = 138,754.77 × 73,820.66
  4. Step 4: Simplify right side
    100,708.34x = 10,242,968,699.55
  5. Step 5: Solve for x
    x = 10,242,968,699.55/100,708.34
  6. Step 6: Final answer
    x = 101,709.24

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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.