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Finding the Fourth Proportional to 210,511.48, 315,762.78 and 68,356.60

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Solution

The fourth proportional to 210,511.48, 315,762.78 and 68,356.60 is: 102,533.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,511.48 : 315,762.78 = 68,356.60 : x
  2. Step 2: Convert to fraction form
    210,511.48/315,762.78 = 68,356.60/x
  3. Step 3: Cross multiply
    210,511.48x = 315,762.78 × 68,356.60
  4. Step 4: Simplify right side
    210,511.48x = 21,584,470,047.35
  5. Step 5: Solve for x
    x = 21,584,470,047.35/210,511.48
  6. Step 6: Final answer
    x = 102,533.46

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1.5x scale

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.