Home / 77,315.20-116,145.60-74,166.40

Finding the Fourth Proportional to 77,315.20, 116,145.60 and 74,166.40

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Solution

The fourth proportional to 77,315.20, 116,145.60 and 74,166.40 is: 111,415.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,315.20 : 116,145.60 = 74,166.40 : x
  2. Step 2: Convert to fraction form
    77,315.20/116,145.60 = 74,166.40/x
  3. Step 3: Cross multiply
    77,315.20x = 116,145.60 × 74,166.40
  4. Step 4: Simplify right side
    77,315.20x = 8,614,101,027.84
  5. Step 5: Solve for x
    x = 8,614,101,027.84/77,315.20
  6. Step 6: Final answer
    x = 111,415.36

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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.