Home / 124,406.87-171,706.10-79,138.40

Finding the Fourth Proportional to 124,406.87, 171,706.10 and 79,138.40

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Solution

The fourth proportional to 124,406.87, 171,706.10 and 79,138.40 is: 109,226.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,406.87 : 171,706.10 = 79,138.40 : x
  2. Step 2: Convert to fraction form
    124,406.87/171,706.10 = 79,138.40/x
  3. Step 3: Cross multiply
    124,406.87x = 171,706.10 × 79,138.40
  4. Step 4: Simplify right side
    124,406.87x = 13,588,544,770.02
  5. Step 5: Solve for x
    x = 13,588,544,770.02/124,406.87
  6. Step 6: Final answer
    x = 109,226.65

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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.