Home / 120,085.14-180,100.32-45,213.18

Finding the Fourth Proportional to 120,085.14, 180,100.32 and 45,213.18

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Solution

The fourth proportional to 120,085.14, 180,100.32 and 45,213.18 is: 67,809.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,085.14 : 180,100.32 = 45,213.18 : x
  2. Step 2: Convert to fraction form
    120,085.14/180,100.32 = 45,213.18/x
  3. Step 3: Cross multiply
    120,085.14x = 180,100.32 × 45,213.18
  4. Step 4: Simplify right side
    120,085.14x = 8,142,908,186.22
  5. Step 5: Solve for x
    x = 8,142,908,186.22/120,085.14
  6. Step 6: Final answer
    x = 67,809.46

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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.