Home / 120,142.85-180,288.39-61,020.95

Finding the Fourth Proportional to 120,142.85, 180,288.39 and 61,020.95

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Solution

The fourth proportional to 120,142.85, 180,288.39 and 61,020.95 is: 91,569.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,142.85 : 180,288.39 = 61,020.95 : x
  2. Step 2: Convert to fraction form
    120,142.85/180,288.39 = 61,020.95/x
  3. Step 3: Cross multiply
    120,142.85x = 180,288.39 × 61,020.95
  4. Step 4: Simplify right side
    120,142.85x = 11,001,368,831.77
  5. Step 5: Solve for x
    x = 11,001,368,831.77/120,142.85
  6. Step 6: Final answer
    x = 91,569.07

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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.