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Finding the Fourth Proportional to 212,616.93, 318,974.40 and 70,456.26

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Solution

The fourth proportional to 212,616.93, 318,974.40 and 70,456.26 is: 105,700.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,616.93 : 318,974.40 = 70,456.26 : x
  2. Step 2: Convert to fraction form
    212,616.93/318,974.40 = 70,456.26/x
  3. Step 3: Cross multiply
    212,616.93x = 318,974.40 × 70,456.26
  4. Step 4: Simplify right side
    212,616.93x = 22,473,743,259.74
  5. Step 5: Solve for x
    x = 22,473,743,259.74/212,616.93
  6. Step 6: Final answer
    x = 105,700.63

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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.