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Finding the Fourth Proportional to 85,803,571.60, 128,705,357.40 and 45,492,787.60

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Solution

The fourth proportional to 85,803,571.60, 128,705,357.40 and 45,492,787.60 is: 68,239,181.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,803,571.60 : 128,705,357.40 = 45,492,787.60 : x
  2. Step 2: Convert to fraction form
    85,803,571.60/128,705,357.40 = 45,492,787.60/x
  3. Step 3: Cross multiply
    85,803,571.60x = 128,705,357.40 × 45,492,787.60
  4. Step 4: Simplify right side
    85,803,571.60x = 5,855,165,487,180,289
  5. Step 5: Solve for x
    x = 5,855,165,487,180,289/85,803,571.60
  6. Step 6: Final answer
    x = 68,239,181.40

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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.