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Finding the Fourth Proportional to 77,145.70, 115,718.55 and 64,023.70

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Solution

The fourth proportional to 77,145.70, 115,718.55 and 64,023.70 is: 96,035.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,145.70 : 115,718.55 = 64,023.70 : x
  2. Step 2: Convert to fraction form
    77,145.70/115,718.55 = 64,023.70/x
  3. Step 3: Cross multiply
    77,145.70x = 115,718.55 × 64,023.70
  4. Step 4: Simplify right side
    77,145.70x = 7,408,729,729.64
  5. Step 5: Solve for x
    x = 7,408,729,729.64/77,145.70
  6. Step 6: Final answer
    x = 96,035.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.