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Finding the Fourth Proportional to 245,611.68, 368,586.69 and 85,688.52

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Solution

The fourth proportional to 245,611.68, 368,586.69 and 85,688.52 is: 128,591.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,611.68 : 368,586.69 = 85,688.52 : x
  2. Step 2: Convert to fraction form
    245,611.68/368,586.69 = 85,688.52/x
  3. Step 3: Cross multiply
    245,611.68x = 368,586.69 × 85,688.52
  4. Step 4: Simplify right side
    245,611.68x = 31,583,647,957.80
  5. Step 5: Solve for x
    x = 31,583,647,957.80/245,611.68
  6. Step 6: Final answer
    x = 128,591.80

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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.