Home / 212,898.17-318,985.74-128,480.96

Finding the Fourth Proportional to 212,898.17, 318,985.74 and 128,480.96

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Solution

The fourth proportional to 212,898.17, 318,985.74 and 128,480.96 is: 192,503.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,898.17 : 318,985.74 = 128,480.96 : x
  2. Step 2: Convert to fraction form
    212,898.17/318,985.74 = 128,480.96/x
  3. Step 3: Cross multiply
    212,898.17x = 318,985.74 × 128,480.96
  4. Step 4: Simplify right side
    212,898.17x = 40,983,592,506.58
  5. Step 5: Solve for x
    x = 40,983,592,506.58/212,898.17
  6. Step 6: Final answer
    x = 192,503.27

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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.