Home / 85,928.98-128,888.34-51,090.34

Finding the Fourth Proportional to 85,928.98, 128,888.34 and 51,090.34

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Solution

The fourth proportional to 85,928.98, 128,888.34 and 51,090.34 is: 76,632.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,928.98 : 128,888.34 = 51,090.34 : x
  2. Step 2: Convert to fraction form
    85,928.98/128,888.34 = 51,090.34/x
  3. Step 3: Cross multiply
    85,928.98x = 128,888.34 × 51,090.34
  4. Step 4: Simplify right side
    85,928.98x = 6,584,949,112.64
  5. Step 5: Solve for x
    x = 6,584,949,112.64/85,928.98
  6. Step 6: Final answer
    x = 76,632.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.