Home / 278,088.12-417,131.70-78,408.12

Finding the Fourth Proportional to 278,088.12, 417,131.70 and 78,408.12

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Solution

The fourth proportional to 278,088.12, 417,131.70 and 78,408.12 is: 117,612.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,088.12 : 417,131.70 = 78,408.12 : x
  2. Step 2: Convert to fraction form
    278,088.12/417,131.70 = 78,408.12/x
  3. Step 3: Cross multiply
    278,088.12x = 417,131.70 × 78,408.12
  4. Step 4: Simplify right side
    278,088.12x = 32,706,512,389.40
  5. Step 5: Solve for x
    x = 32,706,512,389.40/278,088.12
  6. Step 6: Final answer
    x = 117,612.04

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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.