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Finding the Fourth Proportional to 101,435.22, 139,933.44 and 65,636.80

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Solution

The fourth proportional to 101,435.22, 139,933.44 and 65,636.80 is: 90,548.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,435.22 : 139,933.44 = 65,636.80 : x
  2. Step 2: Convert to fraction form
    101,435.22/139,933.44 = 65,636.80/x
  3. Step 3: Cross multiply
    101,435.22x = 139,933.44 × 65,636.80
  4. Step 4: Simplify right side
    101,435.22x = 9,184,782,864.76
  5. Step 5: Solve for x
    x = 9,184,782,864.76/101,435.22
  6. Step 6: Final answer
    x = 90,548.26

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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.