Home / 129,669.27-178,946.75-72,308.03

Finding the Fourth Proportional to 129,669.27, 178,946.75 and 72,308.03

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Solution

The fourth proportional to 129,669.27, 178,946.75 and 72,308.03 is: 99,786.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,669.27 : 178,946.75 = 72,308.03 : x
  2. Step 2: Convert to fraction form
    129,669.27/178,946.75 = 72,308.03/x
  3. Step 3: Cross multiply
    129,669.27x = 178,946.75 × 72,308.03
  4. Step 4: Simplify right side
    129,669.27x = 12,939,286,967.40
  5. Step 5: Solve for x
    x = 12,939,286,967.40/129,669.27
  6. Step 6: Final answer
    x = 99,786.84

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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.