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Finding the Fourth Proportional to 216,418.04, 324,661.94 and 66,658.28

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Solution

The fourth proportional to 216,418.04, 324,661.94 and 66,658.28 is: 99,998.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,418.04 : 324,661.94 = 66,658.28 : x
  2. Step 2: Convert to fraction form
    216,418.04/324,661.94 = 66,658.28/x
  3. Step 3: Cross multiply
    216,418.04x = 324,661.94 × 66,658.28
  4. Step 4: Simplify right side
    216,418.04x = 21,641,406,501.86
  5. Step 5: Solve for x
    x = 21,641,406,501.86/216,418.04
  6. Step 6: Final answer
    x = 99,998.16

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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.