Home / 78,515.16-117,706.51-34,108.75

Finding the Fourth Proportional to 78,515.16, 117,706.51 and 34,108.75

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Solution

The fourth proportional to 78,515.16, 117,706.51 and 34,108.75 is: 51,134.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,515.16 : 117,706.51 = 34,108.75 : x
  2. Step 2: Convert to fraction form
    78,515.16/117,706.51 = 34,108.75/x
  3. Step 3: Cross multiply
    78,515.16x = 117,706.51 × 34,108.75
  4. Step 4: Simplify right side
    78,515.16x = 4,014,821,922.96
  5. Step 5: Solve for x
    x = 4,014,821,922.96/78,515.16
  6. Step 6: Final answer
    x = 51,134.35

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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.