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Finding the Fourth Proportional to 91,668.96, 137,713.97 and 64,713.28

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Solution

The fourth proportional to 91,668.96, 137,713.97 and 64,713.28 is: 97,218.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,668.96 : 137,713.97 = 64,713.28 : x
  2. Step 2: Convert to fraction form
    91,668.96/137,713.97 = 64,713.28/x
  3. Step 3: Cross multiply
    91,668.96x = 137,713.97 × 64,713.28
  4. Step 4: Simplify right side
    91,668.96x = 8,911,922,700.52
  5. Step 5: Solve for x
    x = 8,911,922,700.52/91,668.96
  6. Step 6: Final answer
    x = 97,218.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.