Home / 115,989.24-160,114.16-78,314.52

Finding the Fourth Proportional to 115,989.24, 160,114.16 and 78,314.52

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Solution

The fourth proportional to 115,989.24, 160,114.16 and 78,314.52 is: 108,107.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,989.24 : 160,114.16 = 78,314.52 : x
  2. Step 2: Convert to fraction form
    115,989.24/160,114.16 = 78,314.52/x
  3. Step 3: Cross multiply
    115,989.24x = 160,114.16 × 78,314.52
  4. Step 4: Simplify right side
    115,989.24x = 12,539,263,585.60
  5. Step 5: Solve for x
    x = 12,539,263,585.60/115,989.24
  6. Step 6: Final answer
    x = 108,107.13

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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.