Home / 120,286,121.58-165,994,915.75-65,281,978.08

Finding the Fourth Proportional to 120,286,121.58, 165,994,915.75 and 65,281,978.08

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Solution

The fourth proportional to 120,286,121.58, 165,994,915.75 and 65,281,978.08 is: 90,089,166.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,286,121.58 : 165,994,915.75 = 65,281,978.08 : x
  2. Step 2: Convert to fraction form
    120,286,121.58/165,994,915.75 = 65,281,978.08/x
  3. Step 3: Cross multiply
    120,286,121.58x = 165,994,915.75 × 65,281,978.08
  4. Step 4: Simplify right side
    120,286,121.58x = 10,836,476,451,219,742
  5. Step 5: Solve for x
    x = 10,836,476,451,219,742/120,286,121.58
  6. Step 6: Final answer
    x = 90,089,166.64

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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.