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Finding the Fourth Proportional to 92,789.15, 128,049 and 50,347.67

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Solution

The fourth proportional to 92,789.15, 128,049 and 50,347.67 is: 69,479.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,789.15 : 128,049 = 50,347.67 : x
  2. Step 2: Convert to fraction form
    92,789.15/128,049 = 50,347.67/x
  3. Step 3: Cross multiply
    92,789.15x = 128,049 × 50,347.67
  4. Step 4: Simplify right side
    92,789.15x = 6,446,968,795.83
  5. Step 5: Solve for x
    x = 6,446,968,795.83/92,789.15
  6. Step 6: Final answer
    x = 69,479.77

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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.