Home / 211,423.40-317,128.94-78,300.70

Finding the Fourth Proportional to 211,423.40, 317,128.94 and 78,300.70

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Solution

The fourth proportional to 211,423.40, 317,128.94 and 78,300.70 is: 117,448.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,423.40 : 317,128.94 = 78,300.70 : x
  2. Step 2: Convert to fraction form
    211,423.40/317,128.94 = 78,300.70/x
  3. Step 3: Cross multiply
    211,423.40x = 317,128.94 × 78,300.70
  4. Step 4: Simplify right side
    211,423.40x = 24,831,417,992.26
  5. Step 5: Solve for x
    x = 24,831,417,992.26/211,423.40
  6. Step 6: Final answer
    x = 117,448.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.