Home / 103,631.85-155,356.65-70,243.65

Finding the Fourth Proportional to 103,631.85, 155,356.65 and 70,243.65

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Solution

The fourth proportional to 103,631.85, 155,356.65 and 70,243.65 is: 105,303.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,631.85 : 155,356.65 = 70,243.65 : x
  2. Step 2: Convert to fraction form
    103,631.85/155,356.65 = 70,243.65/x
  3. Step 3: Cross multiply
    103,631.85x = 155,356.65 × 70,243.65
  4. Step 4: Simplify right side
    103,631.85x = 10,912,818,147.77
  5. Step 5: Solve for x
    x = 10,912,818,147.77/103,631.85
  6. Step 6: Final answer
    x = 105,303.71

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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.