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Finding the Fourth Proportional to 258,191.42, 387,276.60 and 89,749.94

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Solution

The fourth proportional to 258,191.42, 387,276.60 and 89,749.94 is: 134,621.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,191.42 : 387,276.60 = 89,749.94 : x
  2. Step 2: Convert to fraction form
    258,191.42/387,276.60 = 89,749.94/x
  3. Step 3: Cross multiply
    258,191.42x = 387,276.60 × 89,749.94
  4. Step 4: Simplify right side
    258,191.42x = 34,758,051,613.40
  5. Step 5: Solve for x
    x = 34,758,051,613.40/258,191.42
  6. Step 6: Final answer
    x = 134,621.25

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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.