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Finding the Fourth Proportional to 210,769.16, 316,170.26 and 61,011.72

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Solution

The fourth proportional to 210,769.16, 316,170.26 and 61,011.72 is: 91,522.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,769.16 : 316,170.26 = 61,011.72 : x
  2. Step 2: Convert to fraction form
    210,769.16/316,170.26 = 61,011.72/x
  3. Step 3: Cross multiply
    210,769.16x = 316,170.26 × 61,011.72
  4. Step 4: Simplify right side
    210,769.16x = 19,290,091,375.45
  5. Step 5: Solve for x
    x = 19,290,091,375.45/210,769.16
  6. Step 6: Final answer
    x = 91,522.36

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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.