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Finding the Fourth Proportional to 101,420.80, 139,914.14 and 65,622.48

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Solution

The fourth proportional to 101,420.80, 139,914.14 and 65,622.48 is: 90,528.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,420.80 : 139,914.14 = 65,622.48 : x
  2. Step 2: Convert to fraction form
    101,420.80/139,914.14 = 65,622.48/x
  3. Step 3: Cross multiply
    101,420.80x = 139,914.14 × 65,622.48
  4. Step 4: Simplify right side
    101,420.80x = 9,181,512,853.87
  5. Step 5: Solve for x
    x = 9,181,512,853.87/101,420.80
  6. Step 6: Final answer
    x = 90,528.89

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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.