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Finding the Fourth Proportional to 216,458.52, 324,718.28 and 66,710.92

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Solution

The fourth proportional to 216,458.52, 324,718.28 and 66,710.92 is: 100,075.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,458.52 : 324,718.28 = 66,710.92 : x
  2. Step 2: Convert to fraction form
    216,458.52/324,718.28 = 66,710.92/x
  3. Step 3: Cross multiply
    216,458.52x = 324,718.28 × 66,710.92
  4. Step 4: Simplify right side
    216,458.52x = 21,662,255,199.62
  5. Step 5: Solve for x
    x = 21,662,255,199.62/216,458.52
  6. Step 6: Final answer
    x = 100,075.78

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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.