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Finding the Fourth Proportional to 77,370.03, 106,789.64 and 47,172.00

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Solution

The fourth proportional to 77,370.03, 106,789.64 and 47,172.00 is: 65,108.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,370.03 : 106,789.64 = 47,172.00 : x
  2. Step 2: Convert to fraction form
    77,370.03/106,789.64 = 47,172.00/x
  3. Step 3: Cross multiply
    77,370.03x = 106,789.64 × 47,172.00
  4. Step 4: Simplify right side
    77,370.03x = 5,037,481,062.68
  5. Step 5: Solve for x
    x = 5,037,481,062.68/77,370.03
  6. Step 6: Final answer
    x = 65,108.95

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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.