Home / 81,428.07-121,961.64-62,569.29

Finding the Fourth Proportional to 81,428.07, 121,961.64 and 62,569.29

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Solution

The fourth proportional to 81,428.07, 121,961.64 and 62,569.29 is: 93,715.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,428.07 : 121,961.64 = 62,569.29 : x
  2. Step 2: Convert to fraction form
    81,428.07/121,961.64 = 62,569.29/x
  3. Step 3: Cross multiply
    81,428.07x = 121,961.64 × 62,569.29
  4. Step 4: Simplify right side
    81,428.07x = 7,631,053,222.04
  5. Step 5: Solve for x
    x = 7,631,053,222.04/81,428.07
  6. Step 6: Final answer
    x = 93,715.27

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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.