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Finding the Fourth Proportional to 124,415.76, 171,639.58 and 79,069.44

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Solution

The fourth proportional to 124,415.76, 171,639.58 and 79,069.44 is: 109,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,415.76 : 171,639.58 = 79,069.44 : x
  2. Step 2: Convert to fraction form
    124,415.76/171,639.58 = 79,069.44/x
  3. Step 3: Cross multiply
    124,415.76x = 171,639.58 × 79,069.44
  4. Step 4: Simplify right side
    124,415.76x = 13,571,445,472.44
  5. Step 5: Solve for x
    x = 13,571,445,472.44/124,415.76
  6. Step 6: Final answer
    x = 109,081.40

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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.