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Finding the Fourth Proportional to 112,393.89, 155,103.48 and 61,407

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Solution

The fourth proportional to 112,393.89, 155,103.48 and 61,407 is: 84,741.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,393.89 : 155,103.48 = 61,407 : x
  2. Step 2: Convert to fraction form
    112,393.89/155,103.48 = 61,407/x
  3. Step 3: Cross multiply
    112,393.89x = 155,103.48 × 61,407
  4. Step 4: Simplify right side
    112,393.89x = 9,524,439,396.36
  5. Step 5: Solve for x
    x = 9,524,439,396.36/112,393.89
  6. Step 6: Final answer
    x = 84,741.61

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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.