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Finding the Fourth Proportional to 145,991.80, 219,060.60 and 82,860.40

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Solution

The fourth proportional to 145,991.80, 219,060.60 and 82,860.40 is: 124,331.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,991.80 : 219,060.60 = 82,860.40 : x
  2. Step 2: Convert to fraction form
    145,991.80/219,060.60 = 82,860.40/x
  3. Step 3: Cross multiply
    145,991.80x = 219,060.60 × 82,860.40
  4. Step 4: Simplify right side
    145,991.80x = 18,151,448,940.24
  5. Step 5: Solve for x
    x = 18,151,448,940.24/145,991.80
  6. Step 6: Final answer
    x = 124,331.98

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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.