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Finding the Fourth Proportional to 128,478.86, 192,468.90 and 94,683.50

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Solution

The fourth proportional to 128,478.86, 192,468.90 and 94,683.50 is: 141,841.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,478.86 : 192,468.90 = 94,683.50 : x
  2. Step 2: Convert to fraction form
    128,478.86/192,468.90 = 94,683.50/x
  3. Step 3: Cross multiply
    128,478.86x = 192,468.90 × 94,683.50
  4. Step 4: Simplify right side
    128,478.86x = 18,223,629,093.15
  5. Step 5: Solve for x
    x = 18,223,629,093.15/128,478.86
  6. Step 6: Final answer
    x = 141,841.46

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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.