Home / 129,291.36-178,420.96-72,701.52

Finding the Fourth Proportional to 129,291.36, 178,420.96 and 72,701.52

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Solution

The fourth proportional to 129,291.36, 178,420.96 and 72,701.52 is: 100,327.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,291.36 : 178,420.96 = 72,701.52 : x
  2. Step 2: Convert to fraction form
    129,291.36/178,420.96 = 72,701.52/x
  3. Step 3: Cross multiply
    129,291.36x = 178,420.96 × 72,701.52
  4. Step 4: Simplify right side
    129,291.36x = 12,971,474,991.86
  5. Step 5: Solve for x
    x = 12,971,474,991.86/129,291.36
  6. Step 6: Final answer
    x = 100,327.47

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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.