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Finding the Fourth Proportional to 112,591.20, 168,886.80 and 45,987.60

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Solution

The fourth proportional to 112,591.20, 168,886.80 and 45,987.60 is: 68,981.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,591.20 : 168,886.80 = 45,987.60 : x
  2. Step 2: Convert to fraction form
    112,591.20/168,886.80 = 45,987.60/x
  3. Step 3: Cross multiply
    112,591.20x = 168,886.80 × 45,987.60
  4. Step 4: Simplify right side
    112,591.20x = 7,766,698,603.68
  5. Step 5: Solve for x
    x = 7,766,698,603.68/112,591.20
  6. Step 6: Final answer
    x = 68,981.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.