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Finding the Fourth Proportional to 245,803.37, 368,706.23 and 85,878.64

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Solution

The fourth proportional to 245,803.37, 368,706.23 and 85,878.64 is: 128,818.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,803.37 : 368,706.23 = 85,878.64 : x
  2. Step 2: Convert to fraction form
    245,803.37/368,706.23 = 85,878.64/x
  3. Step 3: Cross multiply
    245,803.37x = 368,706.23 × 85,878.64
  4. Step 4: Simplify right side
    245,803.37x = 31,663,987,319.00
  5. Step 5: Solve for x
    x = 31,663,987,319.00/245,803.37
  6. Step 6: Final answer
    x = 128,818.36

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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.