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Finding the Fourth Proportional to 128,991.60, 193,487.40 and 119,660.40

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Solution

The fourth proportional to 128,991.60, 193,487.40 and 119,660.40 is: 179,490.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,991.60 : 193,487.40 = 119,660.40 : x
  2. Step 2: Convert to fraction form
    128,991.60/193,487.40 = 119,660.40/x
  3. Step 3: Cross multiply
    128,991.60x = 193,487.40 × 119,660.40
  4. Step 4: Simplify right side
    128,991.60x = 23,152,779,678.96
  5. Step 5: Solve for x
    x = 23,152,779,678.96/128,991.60
  6. Step 6: Final answer
    x = 179,490.60

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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.