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Finding the Fourth Proportional to 190,085.60, 285,128.40 and 49,858.40

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Solution

The fourth proportional to 190,085.60, 285,128.40 and 49,858.40 is: 74,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,085.60 : 285,128.40 = 49,858.40 : x
  2. Step 2: Convert to fraction form
    190,085.60/285,128.40 = 49,858.40/x
  3. Step 3: Cross multiply
    190,085.60x = 285,128.40 × 49,858.40
  4. Step 4: Simplify right side
    190,085.60x = 14,216,045,818.56
  5. Step 5: Solve for x
    x = 14,216,045,818.56/190,085.60
  6. Step 6: Final answer
    x = 74,787.60

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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.