Home / 76,428.21-105,469.45-42,434.94

Finding the Fourth Proportional to 76,428.21, 105,469.45 and 42,434.94

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Solution

The fourth proportional to 76,428.21, 105,469.45 and 42,434.94 is: 58,559.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,428.21 : 105,469.45 = 42,434.94 : x
  2. Step 2: Convert to fraction form
    76,428.21/105,469.45 = 42,434.94/x
  3. Step 3: Cross multiply
    76,428.21x = 105,469.45 × 42,434.94
  4. Step 4: Simplify right side
    76,428.21x = 4,475,589,782.58
  5. Step 5: Solve for x
    x = 4,475,589,782.58/76,428.21
  6. Step 6: Final answer
    x = 58,559.40

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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.