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Finding the Fourth Proportional to 154,099.48, 212,641.44 and 105,742.88

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Solution

The fourth proportional to 154,099.48, 212,641.44 and 105,742.88 is: 145,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,099.48 : 212,641.44 = 105,742.88 : x
  2. Step 2: Convert to fraction form
    154,099.48/212,641.44 = 105,742.88/x
  3. Step 3: Cross multiply
    154,099.48x = 212,641.44 × 105,742.88
  4. Step 4: Simplify right side
    154,099.48x = 22,485,318,272.95
  5. Step 5: Solve for x
    x = 22,485,318,272.95/154,099.48
  6. Step 6: Final answer
    x = 145,914.30

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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.