Home / 86,328,014.20-129,492,021.30-85,824,129.40

Finding the Fourth Proportional to 86,328,014.20, 129,492,021.30 and 85,824,129.40

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Solution

The fourth proportional to 86,328,014.20, 129,492,021.30 and 85,824,129.40 is: 128,736,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,328,014.20 : 129,492,021.30 = 85,824,129.40 : x
  2. Step 2: Convert to fraction form
    86,328,014.20/129,492,021.30 = 85,824,129.40/x
  3. Step 3: Cross multiply
    86,328,014.20x = 129,492,021.30 × 85,824,129.40
  4. Step 4: Simplify right side
    86,328,014.20x = 11,113,539,992,318,756
  5. Step 5: Solve for x
    x = 11,113,539,992,318,756/86,328,014.20
  6. Step 6: Final answer
    x = 128,736,194.10

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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.