Home / 128,448.69-177,255.54-71,090.36

Finding the Fourth Proportional to 128,448.69, 177,255.54 and 71,090.36

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Solution

The fourth proportional to 128,448.69, 177,255.54 and 71,090.36 is: 98,102.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,448.69 : 177,255.54 = 71,090.36 : x
  2. Step 2: Convert to fraction form
    128,448.69/177,255.54 = 71,090.36/x
  3. Step 3: Cross multiply
    128,448.69x = 177,255.54 × 71,090.36
  4. Step 4: Simplify right side
    128,448.69x = 12,601,159,929.03
  5. Step 5: Solve for x
    x = 12,601,159,929.03/128,448.69
  6. Step 6: Final answer
    x = 98,102.68

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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.