Home / 154,406.45-231,574.81-78,428.04

Finding the Fourth Proportional to 154,406.45, 231,574.81 and 78,428.04

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Solution

The fourth proportional to 154,406.45, 231,574.81 and 78,428.04 is: 117,624.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,406.45 : 231,574.81 = 78,428.04 : x
  2. Step 2: Convert to fraction form
    154,406.45/231,574.81 = 78,428.04/x
  3. Step 3: Cross multiply
    154,406.45x = 231,574.81 × 78,428.04
  4. Step 4: Simplify right side
    154,406.45x = 18,161,958,461.67
  5. Step 5: Solve for x
    x = 18,161,958,461.67/154,406.45
  6. Step 6: Final answer
    x = 117,624.35

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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.