Home / 85,634.10-118,288-65,736.86

Finding the Fourth Proportional to 85,634.10, 118,288 and 65,736.86

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Solution

The fourth proportional to 85,634.10, 118,288 and 65,736.86 is: 90,803.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,634.10 : 118,288 = 65,736.86 : x
  2. Step 2: Convert to fraction form
    85,634.10/118,288 = 65,736.86/x
  3. Step 3: Cross multiply
    85,634.10x = 118,288 × 65,736.86
  4. Step 4: Simplify right side
    85,634.10x = 7,775,881,695.68
  5. Step 5: Solve for x
    x = 7,775,881,695.68/85,634.10
  6. Step 6: Final answer
    x = 90,803.57

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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.