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Finding the Fourth Proportional to 128,370.60, 192,191.40 and 121,388.40

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Solution

The fourth proportional to 128,370.60, 192,191.40 and 121,388.40 is: 181,737.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,370.60 : 192,191.40 = 121,388.40 : x
  2. Step 2: Convert to fraction form
    128,370.60/192,191.40 = 121,388.40/x
  3. Step 3: Cross multiply
    128,370.60x = 192,191.40 × 121,388.40
  4. Step 4: Simplify right side
    128,370.60x = 23,329,806,539.76
  5. Step 5: Solve for x
    x = 23,329,806,539.76/128,370.60
  6. Step 6: Final answer
    x = 181,737.93

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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.