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Finding the Fourth Proportional to 213,775.60, 320,663.40 and 82,447.60

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Solution

The fourth proportional to 213,775.60, 320,663.40 and 82,447.60 is: 123,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,775.60 : 320,663.40 = 82,447.60 : x
  2. Step 2: Convert to fraction form
    213,775.60/320,663.40 = 82,447.60/x
  3. Step 3: Cross multiply
    213,775.60x = 320,663.40 × 82,447.60
  4. Step 4: Simplify right side
    213,775.60x = 26,437,927,737.84
  5. Step 5: Solve for x
    x = 26,437,927,737.84/213,775.60
  6. Step 6: Final answer
    x = 123,671.40

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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.