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Finding the Fourth Proportional to 216,626.86, 324,948.66 and 66,853.72

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Solution

The fourth proportional to 216,626.86, 324,948.66 and 66,853.72 is: 100,283.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,626.86 : 324,948.66 = 66,853.72 : x
  2. Step 2: Convert to fraction form
    216,626.86/324,948.66 = 66,853.72/x
  3. Step 3: Cross multiply
    216,626.86x = 324,948.66 × 66,853.72
  4. Step 4: Simplify right side
    216,626.86x = 21,724,026,730.02
  5. Step 5: Solve for x
    x = 21,724,026,730.02/216,626.86
  6. Step 6: Final answer
    x = 100,283.16

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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.