Home / 319,081.20-478,621.80-108,956.40

Finding the Fourth Proportional to 319,081.20, 478,621.80 and 108,956.40

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Solution

The fourth proportional to 319,081.20, 478,621.80 and 108,956.40 is: 163,434.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,081.20 : 478,621.80 = 108,956.40 : x
  2. Step 2: Convert to fraction form
    319,081.20/478,621.80 = 108,956.40/x
  3. Step 3: Cross multiply
    319,081.20x = 478,621.80 × 108,956.40
  4. Step 4: Simplify right side
    319,081.20x = 52,148,908,289.52
  5. Step 5: Solve for x
    x = 52,148,908,289.52/319,081.20
  6. Step 6: Final answer
    x = 163,434.60

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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.