Home / 258,449,070.72-387,589,722.48-85,879,568.64

Finding the Fourth Proportional to 258,449,070.72, 387,589,722.48 and 85,879,568.64

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Solution

The fourth proportional to 258,449,070.72, 387,589,722.48 and 85,879,568.64 is: 128,791,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,449,070.72 : 387,589,722.48 = 85,879,568.64 : x
  2. Step 2: Convert to fraction form
    258,449,070.72/387,589,722.48 = 85,879,568.64/x
  3. Step 3: Cross multiply
    258,449,070.72x = 387,589,722.48 × 85,879,568.64
  4. Step 4: Simplify right side
    258,449,070.72x = 33,286,038,175,879,712
  5. Step 5: Solve for x
    x = 33,286,038,175,879,712/258,449,070.72
  6. Step 6: Final answer
    x = 128,791,479.43

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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.