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Finding the Fourth Proportional to 146,539.80, 219,809.70 and 128,460.60

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Solution

The fourth proportional to 146,539.80, 219,809.70 and 128,460.60 is: 192,690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,539.80 : 219,809.70 = 128,460.60 : x
  2. Step 2: Convert to fraction form
    146,539.80/219,809.70 = 128,460.60/x
  3. Step 3: Cross multiply
    146,539.80x = 219,809.70 × 128,460.60
  4. Step 4: Simplify right side
    146,539.80x = 28,236,885,947.82
  5. Step 5: Solve for x
    x = 28,236,885,947.82/146,539.80
  6. Step 6: Final answer
    x = 192,690.90

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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.