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Finding the Fourth Proportional to 70,477.63, 105,714.66 and 20,558.16

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Solution

The fourth proportional to 70,477.63, 105,714.66 and 20,558.16 is: 30,836.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,477.63 : 105,714.66 = 20,558.16 : x
  2. Step 2: Convert to fraction form
    70,477.63/105,714.66 = 20,558.16/x
  3. Step 3: Cross multiply
    70,477.63x = 105,714.66 × 20,558.16
  4. Step 4: Simplify right side
    70,477.63x = 2,173,299,236.01
  5. Step 5: Solve for x
    x = 2,173,299,236.01/70,477.63
  6. Step 6: Final answer
    x = 30,836.72

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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.