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Finding the Fourth Proportional to 72,612.30, 108,918.45 and 66,051.30

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Solution

The fourth proportional to 72,612.30, 108,918.45 and 66,051.30 is: 99,076.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,612.30 : 108,918.45 = 66,051.30 : x
  2. Step 2: Convert to fraction form
    72,612.30/108,918.45 = 66,051.30/x
  3. Step 3: Cross multiply
    72,612.30x = 108,918.45 × 66,051.30
  4. Step 4: Simplify right side
    72,612.30x = 7,194,205,216.49
  5. Step 5: Solve for x
    x = 7,194,205,216.49/72,612.30
  6. Step 6: Final answer
    x = 99,076.95

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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.