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Finding the Fourth Proportional to 91,985.49, 126,911.43 and 53,717.43

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Solution

The fourth proportional to 91,985.49, 126,911.43 and 53,717.43 is: 74,113.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,985.49 : 126,911.43 = 53,717.43 : x
  2. Step 2: Convert to fraction form
    91,985.49/126,911.43 = 53,717.43/x
  3. Step 3: Cross multiply
    91,985.49x = 126,911.43 × 53,717.43
  4. Step 4: Simplify right side
    91,985.49x = 6,817,355,857.22
  5. Step 5: Solve for x
    x = 6,817,355,857.22/91,985.49
  6. Step 6: Final answer
    x = 74,113.38

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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.