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Finding the Fourth Proportional to 258,607.35, 387,895.28 and 123,767.28

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Solution

The fourth proportional to 258,607.35, 387,895.28 and 123,767.28 is: 185,643.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,607.35 : 387,895.28 = 123,767.28 : x
  2. Step 2: Convert to fraction form
    258,607.35/387,895.28 = 123,767.28/x
  3. Step 3: Cross multiply
    258,607.35x = 387,895.28 × 123,767.28
  4. Step 4: Simplify right side
    258,607.35x = 48,008,743,111.60
  5. Step 5: Solve for x
    x = 48,008,743,111.60/258,607.35
  6. Step 6: Final answer
    x = 185,643.38

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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.