Home / 129,622.16-178,884.09-72,261.47

Finding the Fourth Proportional to 129,622.16, 178,884.09 and 72,261.47

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Solution

The fourth proportional to 129,622.16, 178,884.09 and 72,261.47 is: 99,723.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,622.16 : 178,884.09 = 72,261.47 : x
  2. Step 2: Convert to fraction form
    129,622.16/178,884.09 = 72,261.47/x
  3. Step 3: Cross multiply
    129,622.16x = 178,884.09 × 72,261.47
  4. Step 4: Simplify right side
    129,622.16x = 12,926,426,408.59
  5. Step 5: Solve for x
    x = 12,926,426,408.59/129,622.16
  6. Step 6: Final answer
    x = 99,723.90

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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.