Home / 76,389.86-105,418.05-42,398.36

Finding the Fourth Proportional to 76,389.86, 105,418.05 and 42,398.36

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Solution

The fourth proportional to 76,389.86, 105,418.05 and 42,398.36 is: 58,509.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,389.86 : 105,418.05 = 42,398.36 : x
  2. Step 2: Convert to fraction form
    76,389.86/105,418.05 = 42,398.36/x
  3. Step 3: Cross multiply
    76,389.86x = 105,418.05 × 42,398.36
  4. Step 4: Simplify right side
    76,389.86x = 4,469,552,222.41
  5. Step 5: Solve for x
    x = 4,469,552,222.41/76,389.86
  6. Step 6: Final answer
    x = 58,509.76

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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.