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Finding the Fourth Proportional to 74,492.60, 111,738.90 and 42,999.80

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Solution

The fourth proportional to 74,492.60, 111,738.90 and 42,999.80 is: 64,499.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,492.60 : 111,738.90 = 42,999.80 : x
  2. Step 2: Convert to fraction form
    74,492.60/111,738.90 = 42,999.80/x
  3. Step 3: Cross multiply
    74,492.60x = 111,738.90 × 42,999.80
  4. Step 4: Simplify right side
    74,492.60x = 4,804,750,352.22
  5. Step 5: Solve for x
    x = 4,804,750,352.22/74,492.60
  6. Step 6: Final answer
    x = 64,499.70

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Similar ratio
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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.