Home / 90,128.40-124,374.84-49,841.04

Finding the Fourth Proportional to 90,128.40, 124,374.84 and 49,841.04

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Solution

The fourth proportional to 90,128.40, 124,374.84 and 49,841.04 is: 68,779.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,128.40 : 124,374.84 = 49,841.04 : x
  2. Step 2: Convert to fraction form
    90,128.40/124,374.84 = 49,841.04/x
  3. Step 3: Cross multiply
    90,128.40x = 124,374.84 × 49,841.04
  4. Step 4: Simplify right side
    90,128.40x = 6,198,971,375.43
  5. Step 5: Solve for x
    x = 6,198,971,375.43/90,128.40
  6. Step 6: Final answer
    x = 68,779.33

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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.