Home / 211,667.52-317,520-78,549.28

Finding the Fourth Proportional to 211,667.52, 317,520 and 78,549.28

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Solution

The fourth proportional to 211,667.52, 317,520 and 78,549.28 is: 117,830.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,667.52 : 317,520 = 78,549.28 : x
  2. Step 2: Convert to fraction form
    211,667.52/317,520 = 78,549.28/x
  3. Step 3: Cross multiply
    211,667.52x = 317,520 × 78,549.28
  4. Step 4: Simplify right side
    211,667.52x = 24,940,967,385.60
  5. Step 5: Solve for x
    x = 24,940,967,385.60/211,667.52
  6. Step 6: Final answer
    x = 117,830.87

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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.