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Finding the Fourth Proportional to 192,530.79, 288,734.76 and 66,140.55

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Solution

The fourth proportional to 192,530.79, 288,734.76 and 66,140.55 is: 99,189.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,530.79 : 288,734.76 = 66,140.55 : x
  2. Step 2: Convert to fraction form
    192,530.79/288,734.76 = 66,140.55/x
  3. Step 3: Cross multiply
    192,530.79x = 288,734.76 × 66,140.55
  4. Step 4: Simplify right side
    192,530.79x = 19,097,075,830.52
  5. Step 5: Solve for x
    x = 19,097,075,830.52/192,530.79
  6. Step 6: Final answer
    x = 99,189.72

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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.