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Finding the Fourth Proportional to 216,526.80, 324,617.40 and 91,765.20

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Solution

The fourth proportional to 216,526.80, 324,617.40 and 91,765.20 is: 137,574.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,526.80 : 324,617.40 = 91,765.20 : x
  2. Step 2: Convert to fraction form
    216,526.80/324,617.40 = 91,765.20/x
  3. Step 3: Cross multiply
    216,526.80x = 324,617.40 × 91,765.20
  4. Step 4: Simplify right side
    216,526.80x = 29,788,580,634.48
  5. Step 5: Solve for x
    x = 29,788,580,634.48/216,526.80
  6. Step 6: Final answer
    x = 137,574.57

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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.