Home / 258,565.29-387,847.97-81,087.81

Finding the Fourth Proportional to 258,565.29, 387,847.97 and 81,087.81

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Solution

The fourth proportional to 258,565.29, 387,847.97 and 81,087.81 is: 121,631.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,565.29 : 387,847.97 = 81,087.81 : x
  2. Step 2: Convert to fraction form
    258,565.29/387,847.97 = 81,087.81/x
  3. Step 3: Cross multiply
    258,565.29x = 387,847.97 × 81,087.81
  4. Step 4: Simplify right side
    258,565.29x = 31,449,742,094.81
  5. Step 5: Solve for x
    x = 31,449,742,094.81/258,565.29
  6. Step 6: Final answer
    x = 121,631.72

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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.