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Finding the Fourth Proportional to 258,652.76, 387,995.53 and 81,166.77

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Solution

The fourth proportional to 258,652.76, 387,995.53 and 81,166.77 is: 121,755.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,652.76 : 387,995.53 = 81,166.77 : x
  2. Step 2: Convert to fraction form
    258,652.76/387,995.53 = 81,166.77/x
  3. Step 3: Cross multiply
    258,652.76x = 387,995.53 × 81,166.77
  4. Step 4: Simplify right side
    258,652.76x = 31,492,344,046.00
  5. Step 5: Solve for x
    x = 31,492,344,046.00/258,652.76
  6. Step 6: Final answer
    x = 121,755.30

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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.