Home / 205,915.64-309,073.19-99,374.58

Finding the Fourth Proportional to 205,915.64, 309,073.19 and 99,374.58

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Solution

The fourth proportional to 205,915.64, 309,073.19 and 99,374.58 is: 149,158.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,915.64 : 309,073.19 = 99,374.58 : x
  2. Step 2: Convert to fraction form
    205,915.64/309,073.19 = 99,374.58/x
  3. Step 3: Cross multiply
    205,915.64x = 309,073.19 × 99,374.58
  4. Step 4: Simplify right side
    205,915.64x = 30,714,017,948.64
  5. Step 5: Solve for x
    x = 30,714,017,948.64/205,915.64
  6. Step 6: Final answer
    x = 149,158.26

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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.