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Finding the Fourth Proportional to 78,498.81, 117,752.28 and 25,912.41

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Solution

The fourth proportional to 78,498.81, 117,752.28 and 25,912.41 is: 38,869.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,498.81 : 117,752.28 = 25,912.41 : x
  2. Step 2: Convert to fraction form
    78,498.81/117,752.28 = 25,912.41/x
  3. Step 3: Cross multiply
    78,498.81x = 117,752.28 × 25,912.41
  4. Step 4: Simplify right side
    78,498.81x = 3,051,245,357.79
  5. Step 5: Solve for x
    x = 3,051,245,357.79/78,498.81
  6. Step 6: Final answer
    x = 38,869.96

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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.