Home / 129,701.34-178,984.26-72,342.36

Finding the Fourth Proportional to 129,701.34, 178,984.26 and 72,342.36

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Solution

The fourth proportional to 129,701.34, 178,984.26 and 72,342.36 is: 99,830.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,701.34 : 178,984.26 = 72,342.36 : x
  2. Step 2: Convert to fraction form
    129,701.34/178,984.26 = 72,342.36/x
  3. Step 3: Cross multiply
    129,701.34x = 178,984.26 × 72,342.36
  4. Step 4: Simplify right side
    129,701.34x = 12,948,143,771.25
  5. Step 5: Solve for x
    x = 12,948,143,771.25/129,701.34
  6. Step 6: Final answer
    x = 99,830.45

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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.