Home / 81,128.81-121,547.61-49,522.61

Finding the Fourth Proportional to 81,128.81, 121,547.61 and 49,522.61

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Solution

The fourth proportional to 81,128.81, 121,547.61 and 49,522.61 is: 74,195.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,128.81 : 121,547.61 = 49,522.61 : x
  2. Step 2: Convert to fraction form
    81,128.81/121,547.61 = 49,522.61/x
  3. Step 3: Cross multiply
    81,128.81x = 121,547.61 × 49,522.61
  4. Step 4: Simplify right side
    81,128.81x = 6,019,354,278.72
  5. Step 5: Solve for x
    x = 6,019,354,278.72/81,128.81
  6. Step 6: Final answer
    x = 74,195.03

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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.