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Finding the Fourth Proportional to 86,750.94, 130,127.34 and 30,580.60

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Solution

The fourth proportional to 86,750.94, 130,127.34 and 30,580.60 is: 45,871.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,750.94 : 130,127.34 = 30,580.60 : x
  2. Step 2: Convert to fraction form
    86,750.94/130,127.34 = 30,580.60/x
  3. Step 3: Cross multiply
    86,750.94x = 130,127.34 × 30,580.60
  4. Step 4: Simplify right side
    86,750.94x = 3,979,372,133.60
  5. Step 5: Solve for x
    x = 3,979,372,133.60/86,750.94
  6. Step 6: Final answer
    x = 45,871.23

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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.