Home / 128,028.90-176,676.18-71,439.06

Finding the Fourth Proportional to 128,028.90, 176,676.18 and 71,439.06

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Solution

The fourth proportional to 128,028.90, 176,676.18 and 71,439.06 is: 98,583.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,028.90 : 176,676.18 = 71,439.06 : x
  2. Step 2: Convert to fraction form
    128,028.90/176,676.18 = 71,439.06/x
  3. Step 3: Cross multiply
    128,028.90x = 176,676.18 × 71,439.06
  4. Step 4: Simplify right side
    128,028.90x = 12,621,580,223.59
  5. Step 5: Solve for x
    x = 12,621,580,223.59/128,028.90
  6. Step 6: Final answer
    x = 98,583.84

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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.