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Finding the Fourth Proportional to 128,401.74, 192,227.85 and 74,929.86

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Solution

The fourth proportional to 128,401.74, 192,227.85 and 74,929.86 is: 112,176.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,401.74 : 192,227.85 = 74,929.86 : x
  2. Step 2: Convert to fraction form
    128,401.74/192,227.85 = 74,929.86/x
  3. Step 3: Cross multiply
    128,401.74x = 192,227.85 × 74,929.86
  4. Step 4: Simplify right side
    128,401.74x = 14,403,605,888.60
  5. Step 5: Solve for x
    x = 14,403,605,888.60/128,401.74
  6. Step 6: Final answer
    x = 112,176.10

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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.