Home / 78,420.41-108,221.75-42,612.74

Finding the Fourth Proportional to 78,420.41, 108,221.75 and 42,612.74

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Solution

The fourth proportional to 78,420.41, 108,221.75 and 42,612.74 is: 58,806.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,420.41 : 108,221.75 = 42,612.74 : x
  2. Step 2: Convert to fraction form
    78,420.41/108,221.75 = 42,612.74/x
  3. Step 3: Cross multiply
    78,420.41x = 108,221.75 × 42,612.74
  4. Step 4: Simplify right side
    78,420.41x = 4,611,624,540.92
  5. Step 5: Solve for x
    x = 4,611,624,540.92/78,420.41
  6. Step 6: Final answer
    x = 58,806.44

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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.