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Finding the Fourth Proportional to 121,277.70, 181,916.55 and 54,792.90

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Solution

The fourth proportional to 121,277.70, 181,916.55 and 54,792.90 is: 82,189.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,277.70 : 181,916.55 = 54,792.90 : x
  2. Step 2: Convert to fraction form
    121,277.70/181,916.55 = 54,792.90/x
  3. Step 3: Cross multiply
    121,277.70x = 181,916.55 × 54,792.90
  4. Step 4: Simplify right side
    121,277.70x = 9,967,735,332.50
  5. Step 5: Solve for x
    x = 9,967,735,332.50/121,277.70
  6. Step 6: Final answer
    x = 82,189.35

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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.