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Finding the Fourth Proportional to 205,283.55, 307,891.84 and 72,132.72

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Solution

The fourth proportional to 205,283.55, 307,891.84 and 72,132.72 is: 108,187.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,283.55 : 307,891.84 = 72,132.72 : x
  2. Step 2: Convert to fraction form
    205,283.55/307,891.84 = 72,132.72/x
  3. Step 3: Cross multiply
    205,283.55x = 307,891.84 × 72,132.72
  4. Step 4: Simplify right side
    205,283.55x = 22,209,075,885.00
  5. Step 5: Solve for x
    x = 22,209,075,885.00/205,283.55
  6. Step 6: Final answer
    x = 108,187.31

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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.