Home / 128,389.86-192,616.38-49,509.63

Finding the Fourth Proportional to 128,389.86, 192,616.38 and 49,509.63

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Solution

The fourth proportional to 128,389.86, 192,616.38 and 49,509.63 is: 74,276.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,389.86 : 192,616.38 = 49,509.63 : x
  2. Step 2: Convert to fraction form
    128,389.86/192,616.38 = 49,509.63/x
  3. Step 3: Cross multiply
    128,389.86x = 192,616.38 × 49,509.63
  4. Step 4: Simplify right side
    128,389.86x = 9,536,365,705.74
  5. Step 5: Solve for x
    x = 9,536,365,705.74/128,389.86
  6. Step 6: Final answer
    x = 74,276.63

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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.