Home / 76,423.11-105,467.19-42,431.60

Finding the Fourth Proportional to 76,423.11, 105,467.19 and 42,431.60

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Solution

The fourth proportional to 76,423.11, 105,467.19 and 42,431.60 is: 58,557.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,423.11 : 105,467.19 = 42,431.60 : x
  2. Step 2: Convert to fraction form
    76,423.11/105,467.19 = 42,431.60/x
  3. Step 3: Cross multiply
    76,423.11x = 105,467.19 × 42,431.60
  4. Step 4: Simplify right side
    76,423.11x = 4,475,141,143.38
  5. Step 5: Solve for x
    x = 4,475,141,143.38/76,423.11
  6. Step 6: Final answer
    x = 58,557.43

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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.