Home / 78,156.77-117,263.40-30,745.68

Finding the Fourth Proportional to 78,156.77, 117,263.40 and 30,745.68

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Solution

The fourth proportional to 78,156.77, 117,263.40 and 30,745.68 is: 46,129.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,156.77 : 117,263.40 = 30,745.68 : x
  2. Step 2: Convert to fraction form
    78,156.77/117,263.40 = 30,745.68/x
  3. Step 3: Cross multiply
    78,156.77x = 117,263.40 × 30,745.68
  4. Step 4: Simplify right side
    78,156.77x = 3,605,342,972.11
  5. Step 5: Solve for x
    x = 3,605,342,972.11/78,156.77
  6. Step 6: Final answer
    x = 46,129.63

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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.