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Finding the Fourth Proportional to 258,600.48, 387,900.80 and 71,611.96

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Solution

The fourth proportional to 258,600.48, 387,900.80 and 71,611.96 is: 107,417.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,600.48 : 387,900.80 = 71,611.96 : x
  2. Step 2: Convert to fraction form
    258,600.48/387,900.80 = 71,611.96/x
  3. Step 3: Cross multiply
    258,600.48x = 387,900.80 × 71,611.96
  4. Step 4: Simplify right side
    258,600.48x = 27,778,336,573.57
  5. Step 5: Solve for x
    x = 27,778,336,573.57/258,600.48
  6. Step 6: Final answer
    x = 107,417.96

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1.5x scale

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.