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Finding the Fourth Proportional to 130,421.94, 179,989.01 and 73,057.91

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Solution

The fourth proportional to 130,421.94, 179,989.01 and 73,057.91 is: 100,823.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,421.94 : 179,989.01 = 73,057.91 : x
  2. Step 2: Convert to fraction form
    130,421.94/179,989.01 = 73,057.91/x
  3. Step 3: Cross multiply
    130,421.94x = 179,989.01 × 73,057.91
  4. Step 4: Simplify right side
    130,421.94x = 13,149,619,628.33
  5. Step 5: Solve for x
    x = 13,149,619,628.33/130,421.94
  6. Step 6: Final answer
    x = 100,823.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.