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Finding the Fourth Proportional to 258,090.80, 387,190.08 and 130,079.03

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Solution

The fourth proportional to 258,090.80, 387,190.08 and 130,079.03 is: 195,145.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,090.80 : 387,190.08 = 130,079.03 : x
  2. Step 2: Convert to fraction form
    258,090.80/387,190.08 = 130,079.03/x
  3. Step 3: Cross multiply
    258,090.80x = 387,190.08 × 130,079.03
  4. Step 4: Simplify right side
    258,090.80x = 50,365,308,096.07
  5. Step 5: Solve for x
    x = 50,365,308,096.07/258,090.80
  6. Step 6: Final answer
    x = 195,145.70

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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.