Home / 318,956.20-478,434.30-129,416.20

Finding the Fourth Proportional to 318,956.20, 478,434.30 and 129,416.20

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Solution

The fourth proportional to 318,956.20, 478,434.30 and 129,416.20 is: 194,124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,956.20 : 478,434.30 = 129,416.20 : x
  2. Step 2: Convert to fraction form
    318,956.20/478,434.30 = 129,416.20/x
  3. Step 3: Cross multiply
    318,956.20x = 478,434.30 × 129,416.20
  4. Step 4: Simplify right side
    318,956.20x = 61,917,149,055.66
  5. Step 5: Solve for x
    x = 61,917,149,055.66/318,956.20
  6. Step 6: Final answer
    x = 194,124.30

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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.