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Finding the Fourth Proportional to 212,617.51, 318,918.29 and 52,693.97

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Solution

The fourth proportional to 212,617.51, 318,918.29 and 52,693.97 is: 79,038.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,617.51 : 318,918.29 = 52,693.97 : x
  2. Step 2: Convert to fraction form
    212,617.51/318,918.29 = 52,693.97/x
  3. Step 3: Cross multiply
    212,617.51x = 318,918.29 × 52,693.97
  4. Step 4: Simplify right side
    212,617.51x = 16,805,069,744.95
  5. Step 5: Solve for x
    x = 16,805,069,744.95/212,617.51
  6. Step 6: Final answer
    x = 79,038.97

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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.