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Finding the Fourth Proportional to 71,662.47, 98,668.29 and 65,019.45

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Solution

The fourth proportional to 71,662.47, 98,668.29 and 65,019.45 is: 89,521.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,662.47 : 98,668.29 = 65,019.45 : x
  2. Step 2: Convert to fraction form
    71,662.47/98,668.29 = 65,019.45/x
  3. Step 3: Cross multiply
    71,662.47x = 98,668.29 × 65,019.45
  4. Step 4: Simplify right side
    71,662.47x = 6,415,357,948.24
  5. Step 5: Solve for x
    x = 6,415,357,948.24/71,662.47
  6. Step 6: Final answer
    x = 89,521.86

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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.