Home / 345,821.16-518,777.10-135,431.76

Finding the Fourth Proportional to 345,821.16, 518,777.10 and 135,431.76

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Solution

The fourth proportional to 345,821.16, 518,777.10 and 135,431.76 is: 203,165.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,821.16 : 518,777.10 = 135,431.76 : x
  2. Step 2: Convert to fraction form
    345,821.16/518,777.10 = 135,431.76/x
  3. Step 3: Cross multiply
    345,821.16x = 518,777.10 × 135,431.76
  4. Step 4: Simplify right side
    345,821.16x = 70,258,895,700.70
  5. Step 5: Solve for x
    x = 70,258,895,700.70/345,821.16
  6. Step 6: Final answer
    x = 203,165.40

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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.