Home / 129,728,156.22-179,219,307.88-85,179,819.15

Finding the Fourth Proportional to 129,728,156.22, 179,219,307.88 and 85,179,819.15

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Solution

The fourth proportional to 129,728,156.22, 179,219,307.88 and 85,179,819.15 is: 117,675,828.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,728,156.22 : 179,219,307.88 = 85,179,819.15 : x
  2. Step 2: Convert to fraction form
    129,728,156.22/179,219,307.88 = 85,179,819.15/x
  3. Step 3: Cross multiply
    129,728,156.22x = 179,219,307.88 × 85,179,819.15
  4. Step 4: Simplify right side
    129,728,156.22x = 15,265,868,233,406,570
  5. Step 5: Solve for x
    x = 15,265,868,233,406,570/129,728,156.22
  6. Step 6: Final answer
    x = 117,675,828.27

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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.