Home / 129,055.60-178,067.64-72,463.24

Finding the Fourth Proportional to 129,055.60, 178,067.64 and 72,463.24

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Solution

The fourth proportional to 129,055.60, 178,067.64 and 72,463.24 is: 99,982.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,055.60 : 178,067.64 = 72,463.24 : x
  2. Step 2: Convert to fraction form
    129,055.60/178,067.64 = 72,463.24/x
  3. Step 3: Cross multiply
    129,055.60x = 178,067.64 × 72,463.24
  4. Step 4: Simplify right side
    129,055.60x = 12,903,358,133.55
  5. Step 5: Solve for x
    x = 12,903,358,133.55/129,055.60
  6. Step 6: Final answer
    x = 99,982.94

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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.