Home / 211,603.16-317,528.87-78,575.78

Finding the Fourth Proportional to 211,603.16, 317,528.87 and 78,575.78

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Solution

The fourth proportional to 211,603.16, 317,528.87 and 78,575.78 is: 117,909.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,603.16 : 317,528.87 = 78,575.78 : x
  2. Step 2: Convert to fraction form
    211,603.16/317,528.87 = 78,575.78/x
  3. Step 3: Cross multiply
    211,603.16x = 317,528.87 × 78,575.78
  4. Step 4: Simplify right side
    211,603.16x = 24,950,078,632.77
  5. Step 5: Solve for x
    x = 24,950,078,632.77/211,603.16
  6. Step 6: Final answer
    x = 117,909.76

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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.