Home / 258,895.08-388,342.62-81,417.60

Finding the Fourth Proportional to 258,895.08, 388,342.62 and 81,417.60

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Solution

The fourth proportional to 258,895.08, 388,342.62 and 81,417.60 is: 122,126.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,895.08 : 388,342.62 = 81,417.60 : x
  2. Step 2: Convert to fraction form
    258,895.08/388,342.62 = 81,417.60/x
  3. Step 3: Cross multiply
    258,895.08x = 388,342.62 × 81,417.60
  4. Step 4: Simplify right side
    258,895.08x = 31,617,924,098.11
  5. Step 5: Solve for x
    x = 31,617,924,098.11/258,895.08
  6. Step 6: Final answer
    x = 122,126.40

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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.