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Finding the Fourth Proportional to 258,751.64, 388,004.54 and 90,251.50

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Solution

The fourth proportional to 258,751.64, 388,004.54 and 90,251.50 is: 135,334.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,751.64 : 388,004.54 = 90,251.50 : x
  2. Step 2: Convert to fraction form
    258,751.64/388,004.54 = 90,251.50/x
  3. Step 3: Cross multiply
    258,751.64x = 388,004.54 × 90,251.50
  4. Step 4: Simplify right side
    258,751.64x = 35,017,991,741.81
  5. Step 5: Solve for x
    x = 35,017,991,741.81/258,751.64
  6. Step 6: Final answer
    x = 135,334.38

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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.