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Finding the Fourth Proportional to 71,668.62, 98,573.90 and 57,490.38

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Solution

The fourth proportional to 71,668.62, 98,573.90 and 57,490.38 is: 79,072.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,668.62 : 98,573.90 = 57,490.38 : x
  2. Step 2: Convert to fraction form
    71,668.62/98,573.90 = 57,490.38/x
  3. Step 3: Cross multiply
    71,668.62x = 98,573.90 × 57,490.38
  4. Step 4: Simplify right side
    71,668.62x = 5,667,050,681.63
  5. Step 5: Solve for x
    x = 5,667,050,681.63/71,668.62
  6. Step 6: Final answer
    x = 79,072.97

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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.