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Finding the Fourth Proportional to 258,652.88, 387,995.72 and 81,166.89

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Solution

The fourth proportional to 258,652.88, 387,995.72 and 81,166.89 is: 121,755.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,652.88 : 387,995.72 = 81,166.89 : x
  2. Step 2: Convert to fraction form
    258,652.88/387,995.72 = 81,166.89/x
  3. Step 3: Cross multiply
    258,652.88x = 387,995.72 × 81,166.89
  4. Step 4: Simplify right side
    258,652.88x = 31,492,405,925.71
  5. Step 5: Solve for x
    x = 31,492,405,925.71/258,652.88
  6. Step 6: Final answer
    x = 121,755.48

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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.