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Finding the Fourth Proportional to 85,800.95, 128,498.93 and 43,576.28

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Solution

The fourth proportional to 85,800.95, 128,498.93 and 43,576.28 is: 65,261.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,800.95 : 128,498.93 = 43,576.28 : x
  2. Step 2: Convert to fraction form
    85,800.95/128,498.93 = 43,576.28/x
  3. Step 3: Cross multiply
    85,800.95x = 128,498.93 × 43,576.28
  4. Step 4: Simplify right side
    85,800.95x = 5,599,505,260.84
  5. Step 5: Solve for x
    x = 5,599,505,260.84/85,800.95
  6. Step 6: Final answer
    x = 65,261.58

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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.