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Finding the Fourth Proportional to 100,364.41, 138,509.01 and 57,925.67

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Solution

The fourth proportional to 100,364.41, 138,509.01 and 57,925.67 is: 79,940.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,364.41 : 138,509.01 = 57,925.67 : x
  2. Step 2: Convert to fraction form
    100,364.41/138,509.01 = 57,925.67/x
  3. Step 3: Cross multiply
    100,364.41x = 138,509.01 × 57,925.67
  4. Step 4: Simplify right side
    100,364.41x = 8,023,227,205.29
  5. Step 5: Solve for x
    x = 8,023,227,205.29/100,364.41
  6. Step 6: Final answer
    x = 79,940.96

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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.