Home / 128,362.06-177,140.80-70,998.37

Finding the Fourth Proportional to 128,362.06, 177,140.80 and 70,998.37

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Solution

The fourth proportional to 128,362.06, 177,140.80 and 70,998.37 is: 97,978.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,362.06 : 177,140.80 = 70,998.37 : x
  2. Step 2: Convert to fraction form
    128,362.06/177,140.80 = 70,998.37/x
  3. Step 3: Cross multiply
    128,362.06x = 177,140.80 × 70,998.37
  4. Step 4: Simplify right side
    128,362.06x = 12,576,707,440.15
  5. Step 5: Solve for x
    x = 12,576,707,440.15/128,362.06
  6. Step 6: Final answer
    x = 97,978.39

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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.