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Finding the Fourth Proportional to 101,391.24, 139,920.84 and 56,066.88

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Solution

The fourth proportional to 101,391.24, 139,920.84 and 56,066.88 is: 77,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,391.24 : 139,920.84 = 56,066.88 : x
  2. Step 2: Convert to fraction form
    101,391.24/139,920.84 = 56,066.88/x
  3. Step 3: Cross multiply
    101,391.24x = 139,920.84 × 56,066.88
  4. Step 4: Simplify right side
    101,391.24x = 7,844,924,945.78
  5. Step 5: Solve for x
    x = 7,844,924,945.78/101,391.24
  6. Step 6: Final answer
    x = 77,372.81

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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.