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Finding the Fourth Proportional to 258,565.70, 387,848.55 and 81,087.02

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Solution

The fourth proportional to 258,565.70, 387,848.55 and 81,087.02 is: 121,630.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,565.70 : 387,848.55 = 81,087.02 : x
  2. Step 2: Convert to fraction form
    258,565.70/387,848.55 = 81,087.02/x
  3. Step 3: Cross multiply
    258,565.70x = 387,848.55 × 81,087.02
  4. Step 4: Simplify right side
    258,565.70x = 31,449,483,130.82
  5. Step 5: Solve for x
    x = 31,449,483,130.82/258,565.70
  6. Step 6: Final answer
    x = 121,630.53

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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.