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Finding the Fourth Proportional to 70,369.66, 105,554.85 and 17,779.20

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Solution

The fourth proportional to 70,369.66, 105,554.85 and 17,779.20 is: 26,668.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,369.66 : 105,554.85 = 17,779.20 : x
  2. Step 2: Convert to fraction form
    70,369.66/105,554.85 = 17,779.20/x
  3. Step 3: Cross multiply
    70,369.66x = 105,554.85 × 17,779.20
  4. Step 4: Simplify right side
    70,369.66x = 1,876,680,326.62
  5. Step 5: Solve for x
    x = 1,876,680,326.62/70,369.66
  6. Step 6: Final answer
    x = 26,668.88

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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.