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Finding the Fourth Proportional to 112,687.88, 155,343.60 and 85,783.52

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Solution

The fourth proportional to 112,687.88, 155,343.60 and 85,783.52 is: 118,255.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,687.88 : 155,343.60 = 85,783.52 : x
  2. Step 2: Convert to fraction form
    112,687.88/155,343.60 = 85,783.52/x
  3. Step 3: Cross multiply
    112,687.88x = 155,343.60 × 85,783.52
  4. Step 4: Simplify right side
    112,687.88x = 13,325,920,817.47
  5. Step 5: Solve for x
    x = 13,325,920,817.47/112,687.88
  6. Step 6: Final answer
    x = 118,255.14

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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.