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Finding the Fourth Proportional to 213,645.40, 320,468.10 and 65,882.20

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Solution

The fourth proportional to 213,645.40, 320,468.10 and 65,882.20 is: 98,823.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,645.40 : 320,468.10 = 65,882.20 : x
  2. Step 2: Convert to fraction form
    213,645.40/320,468.10 = 65,882.20/x
  3. Step 3: Cross multiply
    213,645.40x = 320,468.10 × 65,882.20
  4. Step 4: Simplify right side
    213,645.40x = 21,113,143,457.82
  5. Step 5: Solve for x
    x = 21,113,143,457.82/213,645.40
  6. Step 6: Final answer
    x = 98,823.30

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1.5x scale

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.