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Finding the Fourth Proportional to 189,723.52, 283,967.52 and 139,783.60

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Solution

The fourth proportional to 189,723.52, 283,967.52 and 139,783.60 is: 209,220.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,723.52 : 283,967.52 = 139,783.60 : x
  2. Step 2: Convert to fraction form
    189,723.52/283,967.52 = 139,783.60/x
  3. Step 3: Cross multiply
    189,723.52x = 283,967.52 × 139,783.60
  4. Step 4: Simplify right side
    189,723.52x = 39,694,002,228.67
  5. Step 5: Solve for x
    x = 39,694,002,228.67/189,723.52
  6. Step 6: Final answer
    x = 209,220.25

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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.