Home / 85,812,579.20-128,768,635.20-31,965,334.40

Finding the Fourth Proportional to 85,812,579.20, 128,768,635.20 and 31,965,334.40

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Solution

The fourth proportional to 85,812,579.20, 128,768,635.20 and 31,965,334.40 is: 47,966,539.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,812,579.20 : 128,768,635.20 = 31,965,334.40 : x
  2. Step 2: Convert to fraction form
    85,812,579.20/128,768,635.20 = 31,965,334.40/x
  3. Step 3: Cross multiply
    85,812,579.20x = 128,768,635.20 × 31,965,334.40
  4. Step 4: Simplify right side
    85,812,579.20x = 4,116,132,484,399,611
  5. Step 5: Solve for x
    x = 4,116,132,484,399,611/85,812,579.20
  6. Step 6: Final answer
    x = 47,966,539.67

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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.