Home / 103,487.20-155,109.30-102,379.12

Finding the Fourth Proportional to 103,487.20, 155,109.30 and 102,379.12

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Solution

The fourth proportional to 103,487.20, 155,109.30 and 102,379.12 is: 153,448.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,487.20 : 155,109.30 = 102,379.12 : x
  2. Step 2: Convert to fraction form
    103,487.20/155,109.30 = 102,379.12/x
  3. Step 3: Cross multiply
    103,487.20x = 155,109.30 × 102,379.12
  4. Step 4: Simplify right side
    103,487.20x = 15,879,953,637.82
  5. Step 5: Solve for x
    x = 15,879,953,637.82/103,487.20
  6. Step 6: Final answer
    x = 153,448.48

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1.5x scale

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.