Home / 205,915.07-309,072.34-99,374.01

Finding the Fourth Proportional to 205,915.07, 309,072.34 and 99,374.01

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Solution

The fourth proportional to 205,915.07, 309,072.34 and 99,374.01 is: 149,157.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,915.07 : 309,072.34 = 99,374.01 : x
  2. Step 2: Convert to fraction form
    205,915.07/309,072.34 = 99,374.01/x
  3. Step 3: Cross multiply
    205,915.07x = 309,072.34 × 99,374.01
  4. Step 4: Simplify right side
    205,915.07x = 30,713,758,509.61
  5. Step 5: Solve for x
    x = 30,713,758,509.61/205,915.07
  6. Step 6: Final answer
    x = 149,157.41

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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.