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Finding the Fourth Proportional to 128,323.60, 192,120.90 and 121,341.40

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Solution

The fourth proportional to 128,323.60, 192,120.90 and 121,341.40 is: 181,667.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,323.60 : 192,120.90 = 121,341.40 : x
  2. Step 2: Convert to fraction form
    128,323.60/192,120.90 = 121,341.40/x
  3. Step 3: Cross multiply
    128,323.60x = 192,120.90 × 121,341.40
  4. Step 4: Simplify right side
    128,323.60x = 23,312,218,975.26
  5. Step 5: Solve for x
    x = 23,312,218,975.26/128,323.60
  6. Step 6: Final answer
    x = 181,667.43

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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.