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Finding the Fourth Proportional to 216,919.80, 325,428.30 and 83,788.20

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Solution

The fourth proportional to 216,919.80, 325,428.30 and 83,788.20 is: 125,701.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,919.80 : 325,428.30 = 83,788.20 : x
  2. Step 2: Convert to fraction form
    216,919.80/325,428.30 = 83,788.20/x
  3. Step 3: Cross multiply
    216,919.80x = 325,428.30 × 83,788.20
  4. Step 4: Simplify right side
    216,919.80x = 27,267,051,486.06
  5. Step 5: Solve for x
    x = 27,267,051,486.06/216,919.80
  6. Step 6: Final answer
    x = 125,701.07

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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.