Home / 103,674.50-143,088.09-78,480.26

Finding the Fourth Proportional to 103,674.50, 143,088.09 and 78,480.26

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Solution

The fourth proportional to 103,674.50, 143,088.09 and 78,480.26 is: 108,315.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,674.50 : 143,088.09 = 78,480.26 : x
  2. Step 2: Convert to fraction form
    103,674.50/143,088.09 = 78,480.26/x
  3. Step 3: Cross multiply
    103,674.50x = 143,088.09 × 78,480.26
  4. Step 4: Simplify right side
    103,674.50x = 11,229,590,506.10
  5. Step 5: Solve for x
    x = 11,229,590,506.10/103,674.50
  6. Step 6: Final answer
    x = 108,315.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.