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Finding the Fourth Proportional to 166,805.84, 250,126.68 and 78,012.56

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Solution

The fourth proportional to 166,805.84, 250,126.68 and 78,012.56 is: 116,980.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    166,805.84 : 250,126.68 = 78,012.56 : x
  2. Step 2: Convert to fraction form
    166,805.84/250,126.68 = 78,012.56/x
  3. Step 3: Cross multiply
    166,805.84x = 250,126.68 × 78,012.56
  4. Step 4: Simplify right side
    166,805.84x = 19,513,022,631.10
  5. Step 5: Solve for x
    x = 19,513,022,631.10/166,805.84
  6. Step 6: Final answer
    x = 116,980.45

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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.