Home / 85,716.30-118,302.51-51,258.78

Finding the Fourth Proportional to 85,716.30, 118,302.51 and 51,258.78

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Solution

The fourth proportional to 85,716.30, 118,302.51 and 51,258.78 is: 70,745.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,716.30 : 118,302.51 = 51,258.78 : x
  2. Step 2: Convert to fraction form
    85,716.30/118,302.51 = 51,258.78/x
  3. Step 3: Cross multiply
    85,716.30x = 118,302.51 × 51,258.78
  4. Step 4: Simplify right side
    85,716.30x = 6,064,042,333.54
  5. Step 5: Solve for x
    x = 6,064,042,333.54/85,716.30
  6. Step 6: Final answer
    x = 70,745.50

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1.5x scale

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.