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Finding the Fourth Proportional to 328,072.32, 492,108.48 and 78,754.32

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Solution

The fourth proportional to 328,072.32, 492,108.48 and 78,754.32 is: 118,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,072.32 : 492,108.48 = 78,754.32 : x
  2. Step 2: Convert to fraction form
    328,072.32/492,108.48 = 78,754.32/x
  3. Step 3: Cross multiply
    328,072.32x = 492,108.48 × 78,754.32
  4. Step 4: Simplify right side
    328,072.32x = 38,755,668,708.63
  5. Step 5: Solve for x
    x = 38,755,668,708.63/328,072.32
  6. Step 6: Final answer
    x = 118,131.48

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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.