Home / 103,618.85-155,337.15-70,230.65

Finding the Fourth Proportional to 103,618.85, 155,337.15 and 70,230.65

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Solution

The fourth proportional to 103,618.85, 155,337.15 and 70,230.65 is: 105,284.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,618.85 : 155,337.15 = 70,230.65 : x
  2. Step 2: Convert to fraction form
    103,618.85/155,337.15 = 70,230.65/x
  3. Step 3: Cross multiply
    103,618.85x = 155,337.15 × 70,230.65
  4. Step 4: Simplify right side
    103,618.85x = 10,909,429,013.65
  5. Step 5: Solve for x
    x = 10,909,429,013.65/103,618.85
  6. Step 6: Final answer
    x = 105,284.21

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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.