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Finding the Fourth Proportional to 216,462.40, 324,725.88 and 66,690.16

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Solution

The fourth proportional to 216,462.40, 324,725.88 and 66,690.16 is: 100,045.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,462.40 : 324,725.88 = 66,690.16 : x
  2. Step 2: Convert to fraction form
    216,462.40/324,725.88 = 66,690.16/x
  3. Step 3: Cross multiply
    216,462.40x = 324,725.88 × 66,690.16
  4. Step 4: Simplify right side
    216,462.40x = 21,656,020,893.34
  5. Step 5: Solve for x
    x = 21,656,020,893.34/216,462.40
  6. Step 6: Final answer
    x = 100,045.19

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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.