Home / 103,696.10-155,708.18-78,764.30

Finding the Fourth Proportional to 103,696.10, 155,708.18 and 78,764.30

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Solution

The fourth proportional to 103,696.10, 155,708.18 and 78,764.30 is: 118,271.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,696.10 : 155,708.18 = 78,764.30 : x
  2. Step 2: Convert to fraction form
    103,696.10/155,708.18 = 78,764.30/x
  3. Step 3: Cross multiply
    103,696.10x = 155,708.18 × 78,764.30
  4. Step 4: Simplify right side
    103,696.10x = 12,264,245,801.97
  5. Step 5: Solve for x
    x = 12,264,245,801.97/103,696.10
  6. Step 6: Final answer
    x = 118,271.04

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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.