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Finding the Fourth Proportional to 78,697, 108,601.86 and 43,369

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Solution

The fourth proportional to 78,697, 108,601.86 and 43,369 is: 59,849.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,697 : 108,601.86 = 43,369 : x
  2. Step 2: Convert to fraction form
    78,697/108,601.86 = 43,369/x
  3. Step 3: Cross multiply
    78,697x = 108,601.86 × 43,369
  4. Step 4: Simplify right side
    78,697x = 4,709,954,066.34
  5. Step 5: Solve for x
    x = 4,709,954,066.34/78,697
  6. Step 6: Final answer
    x = 59,849.22

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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.