Home / 128,363.06-177,142.18-70,999.37

Finding the Fourth Proportional to 128,363.06, 177,142.18 and 70,999.37

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Solution

The fourth proportional to 128,363.06, 177,142.18 and 70,999.37 is: 97,979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,363.06 : 177,142.18 = 70,999.37 : x
  2. Step 2: Convert to fraction form
    128,363.06/177,142.18 = 70,999.37/x
  3. Step 3: Cross multiply
    128,363.06x = 177,142.18 × 70,999.37
  4. Step 4: Simplify right side
    128,363.06x = 12,576,983,180.43
  5. Step 5: Solve for x
    x = 12,576,983,180.43/128,363.06
  6. Step 6: Final answer
    x = 97,979.77

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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.