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Finding the Fourth Proportional to 77,486.20, 115,937.70 and 51,242.20

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Solution

The fourth proportional to 77,486.20, 115,937.70 and 51,242.20 is: 76,670.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,486.20 : 115,937.70 = 51,242.20 : x
  2. Step 2: Convert to fraction form
    77,486.20/115,937.70 = 51,242.20/x
  3. Step 3: Cross multiply
    77,486.20x = 115,937.70 × 51,242.20
  4. Step 4: Simplify right side
    77,486.20x = 5,940,902,810.94
  5. Step 5: Solve for x
    x = 5,940,902,810.94/77,486.20
  6. Step 6: Final answer
    x = 76,670.46

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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.