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Finding the Fourth Proportional to 101,120.88, 139,549.50 and 55,799.40

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Solution

The fourth proportional to 101,120.88, 139,549.50 and 55,799.40 is: 77,004.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,120.88 : 139,549.50 = 55,799.40 : x
  2. Step 2: Convert to fraction form
    101,120.88/139,549.50 = 55,799.40/x
  3. Step 3: Cross multiply
    101,120.88x = 139,549.50 × 55,799.40
  4. Step 4: Simplify right side
    101,120.88x = 7,786,778,370.30
  5. Step 5: Solve for x
    x = 7,786,778,370.30/101,120.88
  6. Step 6: Final answer
    x = 77,004.65

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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.