Home / 212,895.17-318,981.26-128,477.94

Finding the Fourth Proportional to 212,895.17, 318,981.26 and 128,477.94

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Solution

The fourth proportional to 212,895.17, 318,981.26 and 128,477.94 is: 192,498.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,895.17 : 318,981.26 = 128,477.94 : x
  2. Step 2: Convert to fraction form
    212,895.17/318,981.26 = 128,477.94/x
  3. Step 3: Cross multiply
    212,895.17x = 318,981.26 × 128,477.94
  4. Step 4: Simplify right side
    212,895.17x = 40,982,054,541.01
  5. Step 5: Solve for x
    x = 40,982,054,541.01/212,895.17
  6. Step 6: Final answer
    x = 192,498.76

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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.