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Finding the Fourth Proportional to 86,809.79, 130,004.40 and 60,080.87

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Solution

The fourth proportional to 86,809.79, 130,004.40 and 60,080.87 is: 89,975.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,809.79 : 130,004.40 = 60,080.87 : x
  2. Step 2: Convert to fraction form
    86,809.79/130,004.40 = 60,080.87/x
  3. Step 3: Cross multiply
    86,809.79x = 130,004.40 × 60,080.87
  4. Step 4: Simplify right side
    86,809.79x = 7,810,777,455.83
  5. Step 5: Solve for x
    x = 7,810,777,455.83/86,809.79
  6. Step 6: Final answer
    x = 89,975.77

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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.