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Finding the Fourth Proportional to 218,813.57, 301,962.75 and 118,211.57

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Solution

The fourth proportional to 218,813.57, 301,962.75 and 118,211.57 is: 163,131.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,813.57 : 301,962.75 = 118,211.57 : x
  2. Step 2: Convert to fraction form
    218,813.57/301,962.75 = 118,211.57/x
  3. Step 3: Cross multiply
    218,813.57x = 301,962.75 × 118,211.57
  4. Step 4: Simplify right side
    218,813.57x = 35,695,489,249.20
  5. Step 5: Solve for x
    x = 35,695,489,249.20/218,813.57
  6. Step 6: Final answer
    x = 163,131.98

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1.5x scale

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.