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Finding the Fourth Proportional to 86,216.40, 118,978.20 and 48,490.92

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Solution

The fourth proportional to 86,216.40, 118,978.20 and 48,490.92 is: 66,917.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,216.40 : 118,978.20 = 48,490.92 : x
  2. Step 2: Convert to fraction form
    86,216.40/118,978.20 = 48,490.92/x
  3. Step 3: Cross multiply
    86,216.40x = 118,978.20 × 48,490.92
  4. Step 4: Simplify right side
    86,216.40x = 5,769,362,377.94
  5. Step 5: Solve for x
    x = 5,769,362,377.94/86,216.40
  6. Step 6: Final answer
    x = 66,917.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.