Home / 205,918.16-308,880.28-81,258

Finding the Fourth Proportional to 205,918.16, 308,880.28 and 81,258

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Solution

The fourth proportional to 205,918.16, 308,880.28 and 81,258 is: 121,888.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,918.16 : 308,880.28 = 81,258 : x
  2. Step 2: Convert to fraction form
    205,918.16/308,880.28 = 81,258/x
  3. Step 3: Cross multiply
    205,918.16x = 308,880.28 × 81,258
  4. Step 4: Simplify right side
    205,918.16x = 25,098,993,792.24
  5. Step 5: Solve for x
    x = 25,098,993,792.24/205,918.16
  6. Step 6: Final answer
    x = 121,888.20

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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.