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Finding the Fourth Proportional to 112,672.08, 155,486.16 and 61,684.20

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Solution

The fourth proportional to 112,672.08, 155,486.16 and 61,684.20 is: 85,123.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,672.08 : 155,486.16 = 61,684.20 : x
  2. Step 2: Convert to fraction form
    112,672.08/155,486.16 = 61,684.20/x
  3. Step 3: Cross multiply
    112,672.08x = 155,486.16 × 61,684.20
  4. Step 4: Simplify right side
    112,672.08x = 9,591,039,390.67
  5. Step 5: Solve for x
    x = 9,591,039,390.67/112,672.08
  6. Step 6: Final answer
    x = 85,123.48

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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.