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Finding the Fourth Proportional to 71,668.16, 98,900.16 and 39,838.40

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Solution

The fourth proportional to 71,668.16, 98,900.16 and 39,838.40 is: 54,975.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,668.16 : 98,900.16 = 39,838.40 : x
  2. Step 2: Convert to fraction form
    71,668.16/98,900.16 = 39,838.40/x
  3. Step 3: Cross multiply
    71,668.16x = 98,900.16 × 39,838.40
  4. Step 4: Simplify right side
    71,668.16x = 3,940,024,134.14
  5. Step 5: Solve for x
    x = 3,940,024,134.14/71,668.16
  6. Step 6: Final answer
    x = 54,975.94

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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.