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Finding the Fourth Proportional to 86,961.60, 130,600.80 and 76,075.20

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Solution

The fourth proportional to 86,961.60, 130,600.80 and 76,075.20 is: 114,251.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,961.60 : 130,600.80 = 76,075.20 : x
  2. Step 2: Convert to fraction form
    86,961.60/130,600.80 = 76,075.20/x
  3. Step 3: Cross multiply
    86,961.60x = 130,600.80 × 76,075.20
  4. Step 4: Simplify right side
    86,961.60x = 9,935,481,980.16
  5. Step 5: Solve for x
    x = 9,935,481,980.16/86,961.60
  6. Step 6: Final answer
    x = 114,251.37

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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.