Home / 124,389.80-186,639.36-45,515.78

Finding the Fourth Proportional to 124,389.80, 186,639.36 and 45,515.78

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Solution

The fourth proportional to 124,389.80, 186,639.36 and 45,515.78 is: 68,293.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,389.80 : 186,639.36 = 45,515.78 : x
  2. Step 2: Convert to fraction form
    124,389.80/186,639.36 = 45,515.78/x
  3. Step 3: Cross multiply
    124,389.80x = 186,639.36 × 45,515.78
  4. Step 4: Simplify right side
    124,389.80x = 8,495,036,049.10
  5. Step 5: Solve for x
    x = 8,495,036,049.10/124,389.80
  6. Step 6: Final answer
    x = 68,293.67

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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.