Home / 77,139.72-106,422.39-48,442.50

Finding the Fourth Proportional to 77,139.72, 106,422.39 and 48,442.50

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Solution

The fourth proportional to 77,139.72, 106,422.39 and 48,442.50 is: 66,831.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,139.72 : 106,422.39 = 48,442.50 : x
  2. Step 2: Convert to fraction form
    77,139.72/106,422.39 = 48,442.50/x
  3. Step 3: Cross multiply
    77,139.72x = 106,422.39 × 48,442.50
  4. Step 4: Simplify right side
    77,139.72x = 5,155,366,627.58
  5. Step 5: Solve for x
    x = 5,155,366,627.58/77,139.72
  6. Step 6: Final answer
    x = 66,831.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.