Home / 128,440.99-177,284.23-74,736.42

Finding the Fourth Proportional to 128,440.99, 177,284.23 and 74,736.42

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Solution

The fourth proportional to 128,440.99, 177,284.23 and 74,736.42 is: 103,157.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.99 : 177,284.23 = 74,736.42 : x
  2. Step 2: Convert to fraction form
    128,440.99/177,284.23 = 74,736.42/x
  3. Step 3: Cross multiply
    128,440.99x = 177,284.23 × 74,736.42
  4. Step 4: Simplify right side
    128,440.99x = 13,249,588,485.82
  5. Step 5: Solve for x
    x = 13,249,588,485.82/128,440.99
  6. Step 6: Final answer
    x = 103,157.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.