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Finding the Fourth Proportional to 85,838.88, 118,404.84 and 53,981.60

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Solution

The fourth proportional to 85,838.88, 118,404.84 and 53,981.60 is: 74,461.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,838.88 : 118,404.84 = 53,981.60 : x
  2. Step 2: Convert to fraction form
    85,838.88/118,404.84 = 53,981.60/x
  3. Step 3: Cross multiply
    85,838.88x = 118,404.84 × 53,981.60
  4. Step 4: Simplify right side
    85,838.88x = 6,391,682,710.94
  5. Step 5: Solve for x
    x = 6,391,682,710.94/85,838.88
  6. Step 6: Final answer
    x = 74,461.39

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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.