Home / 76,396.12-105,427.76-42,406.78

Finding the Fourth Proportional to 76,396.12, 105,427.76 and 42,406.78

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Solution

The fourth proportional to 76,396.12, 105,427.76 and 42,406.78 is: 58,521.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,396.12 : 105,427.76 = 42,406.78 : x
  2. Step 2: Convert to fraction form
    76,396.12/105,427.76 = 42,406.78/x
  3. Step 3: Cross multiply
    76,396.12x = 105,427.76 × 42,406.78
  4. Step 4: Simplify right side
    76,396.12x = 4,470,851,824.21
  5. Step 5: Solve for x
    x = 4,470,851,824.21/76,396.12
  6. Step 6: Final answer
    x = 58,521.97

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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.