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Finding the Fourth Proportional to 70,187.63, 105,281.90 and 28,071.24

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Solution

The fourth proportional to 70,187.63, 105,281.90 and 28,071.24 is: 42,107.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,187.63 : 105,281.90 = 28,071.24 : x
  2. Step 2: Convert to fraction form
    70,187.63/105,281.90 = 28,071.24/x
  3. Step 3: Cross multiply
    70,187.63x = 105,281.90 × 28,071.24
  4. Step 4: Simplify right side
    70,187.63x = 2,955,393,342.20
  5. Step 5: Solve for x
    x = 2,955,393,342.20/70,187.63
  6. Step 6: Final answer
    x = 42,107.04

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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.