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Finding the Fourth Proportional to 79,614.90, 109,814.13 and 65,443.14

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Solution

The fourth proportional to 79,614.90, 109,814.13 and 65,443.14 is: 90,266.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,614.90 : 109,814.13 = 65,443.14 : x
  2. Step 2: Convert to fraction form
    79,614.90/109,814.13 = 65,443.14/x
  3. Step 3: Cross multiply
    79,614.90x = 109,814.13 × 65,443.14
  4. Step 4: Simplify right side
    79,614.90x = 7,186,581,483.57
  5. Step 5: Solve for x
    x = 7,186,581,483.57/79,614.90
  6. Step 6: Final answer
    x = 90,266.79

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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.