Home / 128,285.49-177,028.75-70,921.17

Finding the Fourth Proportional to 128,285.49, 177,028.75 and 70,921.17

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Solution

The fourth proportional to 128,285.49, 177,028.75 and 70,921.17 is: 97,868.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,285.49 : 177,028.75 = 70,921.17 : x
  2. Step 2: Convert to fraction form
    128,285.49/177,028.75 = 70,921.17/x
  3. Step 3: Cross multiply
    128,285.49x = 177,028.75 × 70,921.17
  4. Step 4: Simplify right side
    128,285.49x = 12,555,084,833.89
  5. Step 5: Solve for x
    x = 12,555,084,833.89/128,285.49
  6. Step 6: Final answer
    x = 97,868.32

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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.