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Finding the Fourth Proportional to 79,686.72, 119,603.79 and 40,271.45

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Solution

The fourth proportional to 79,686.72, 119,603.79 and 40,271.45 is: 60,444.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686.72 : 119,603.79 = 40,271.45 : x
  2. Step 2: Convert to fraction form
    79,686.72/119,603.79 = 40,271.45/x
  3. Step 3: Cross multiply
    79,686.72x = 119,603.79 × 40,271.45
  4. Step 4: Simplify right side
    79,686.72x = 4,816,617,450.78
  5. Step 5: Solve for x
    x = 4,816,617,450.78/79,686.72
  6. Step 6: Final answer
    x = 60,444.42

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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.