Home / 212,140.75-318,362.88-77,204.62

Finding the Fourth Proportional to 212,140.75, 318,362.88 and 77,204.62

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Solution

The fourth proportional to 212,140.75, 318,362.88 and 77,204.62 is: 115,862.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,140.75 : 318,362.88 = 77,204.62 : x
  2. Step 2: Convert to fraction form
    212,140.75/318,362.88 = 77,204.62/x
  3. Step 3: Cross multiply
    212,140.75x = 318,362.88 × 77,204.62
  4. Step 4: Simplify right side
    212,140.75x = 24,579,085,172.51
  5. Step 5: Solve for x
    x = 24,579,085,172.51/212,140.75
  6. Step 6: Final answer
    x = 115,862.16

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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.