Home / 103,672.50-143,085.33-78,478.26

Finding the Fourth Proportional to 103,672.50, 143,085.33 and 78,478.26

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Solution

The fourth proportional to 103,672.50, 143,085.33 and 78,478.26 is: 108,313.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,672.50 : 143,085.33 = 78,478.26 : x
  2. Step 2: Convert to fraction form
    103,672.50/143,085.33 = 78,478.26/x
  3. Step 3: Cross multiply
    103,672.50x = 143,085.33 × 78,478.26
  4. Step 4: Simplify right side
    103,672.50x = 11,229,087,729.93
  5. Step 5: Solve for x
    x = 11,229,087,729.93/103,672.50
  6. Step 6: Final answer
    x = 108,313.08

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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.