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Finding the Fourth Proportional to 77,709.66, 107,235.40 and 45,872.40

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Solution

The fourth proportional to 77,709.66, 107,235.40 and 45,872.40 is: 63,301.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,709.66 : 107,235.40 = 45,872.40 : x
  2. Step 2: Convert to fraction form
    77,709.66/107,235.40 = 45,872.40/x
  3. Step 3: Cross multiply
    77,709.66x = 107,235.40 × 45,872.40
  4. Step 4: Simplify right side
    77,709.66x = 4,919,145,162.96
  5. Step 5: Solve for x
    x = 4,919,145,162.96/77,709.66
  6. Step 6: Final answer
    x = 63,301.59

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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.