Home / 212,885.37-318,966.68-128,468.18

Finding the Fourth Proportional to 212,885.37, 318,966.68 and 128,468.18

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Solution

The fourth proportional to 212,885.37, 318,966.68 and 128,468.18 is: 192,484.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,885.37 : 318,966.68 = 128,468.18 : x
  2. Step 2: Convert to fraction form
    212,885.37/318,966.68 = 128,468.18/x
  3. Step 3: Cross multiply
    212,885.37x = 318,966.68 × 128,468.18
  4. Step 4: Simplify right side
    212,885.37x = 40,977,066,623.07
  5. Step 5: Solve for x
    x = 40,977,066,623.07/212,885.37
  6. Step 6: Final answer
    x = 192,484.18

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1.5x scale

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.