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Finding the Fourth Proportional to 216,415.04, 324,657.44 and 66,655.28

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Solution

The fourth proportional to 216,415.04, 324,657.44 and 66,655.28 is: 99,993.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,415.04 : 324,657.44 = 66,655.28 : x
  2. Step 2: Convert to fraction form
    216,415.04/324,657.44 = 66,655.28/x
  3. Step 3: Cross multiply
    216,415.04x = 324,657.44 × 66,655.28
  4. Step 4: Simplify right side
    216,415.04x = 21,640,132,567.28
  5. Step 5: Solve for x
    x = 21,640,132,567.28/216,415.04
  6. Step 6: Final answer
    x = 99,993.66

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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.