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Finding the Fourth Proportional to 258,652.88, 387,995.72 and 81,166.90

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Solution

The fourth proportional to 258,652.88, 387,995.72 and 81,166.90 is: 121,755.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,652.88 : 387,995.72 = 81,166.90 : x
  2. Step 2: Convert to fraction form
    258,652.88/387,995.72 = 81,166.90/x
  3. Step 3: Cross multiply
    258,652.88x = 387,995.72 × 81,166.90
  4. Step 4: Simplify right side
    258,652.88x = 31,492,407,459.85
  5. Step 5: Solve for x
    x = 31,492,407,459.85/258,652.88
  6. Step 6: Final answer
    x = 121,755.49

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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.