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Finding the Fourth Proportional to 145,855.20, 218,782.80 and 123,985.20

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Solution

The fourth proportional to 145,855.20, 218,782.80 and 123,985.20 is: 185,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,855.20 : 218,782.80 = 123,985.20 : x
  2. Step 2: Convert to fraction form
    145,855.20/218,782.80 = 123,985.20/x
  3. Step 3: Cross multiply
    145,855.20x = 218,782.80 × 123,985.20
  4. Step 4: Simplify right side
    145,855.20x = 27,125,829,214.56
  5. Step 5: Solve for x
    x = 27,125,829,214.56/145,855.20
  6. Step 6: Final answer
    x = 185,977.80

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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.