Home / 128,678.96-192,971-44,417.68

Finding the Fourth Proportional to 128,678.96, 192,971 and 44,417.68

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Solution

The fourth proportional to 128,678.96, 192,971 and 44,417.68 is: 66,610.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,678.96 : 192,971 = 44,417.68 : x
  2. Step 2: Convert to fraction form
    128,678.96/192,971 = 44,417.68/x
  3. Step 3: Cross multiply
    128,678.96x = 192,971 × 44,417.68
  4. Step 4: Simplify right side
    128,678.96x = 8,571,324,127.28
  5. Step 5: Solve for x
    x = 8,571,324,127.28/128,678.96
  6. Step 6: Final answer
    x = 66,610.14

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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.