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Finding the Fourth Proportional to 101,729.52, 140,387.76 and 56,408.40

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Solution

The fourth proportional to 101,729.52, 140,387.76 and 56,408.40 is: 77,844.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,729.52 : 140,387.76 = 56,408.40 : x
  2. Step 2: Convert to fraction form
    101,729.52/140,387.76 = 56,408.40/x
  3. Step 3: Cross multiply
    101,729.52x = 140,387.76 × 56,408.40
  4. Step 4: Simplify right side
    101,729.52x = 7,919,048,921.18
  5. Step 5: Solve for x
    x = 7,919,048,921.18/101,729.52
  6. Step 6: Final answer
    x = 77,844.16

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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.