Home / 76,387.49-105,415.85-42,398.15

Finding the Fourth Proportional to 76,387.49, 105,415.85 and 42,398.15

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Solution

The fourth proportional to 76,387.49, 105,415.85 and 42,398.15 is: 58,510.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,387.49 : 105,415.85 = 42,398.15 : x
  2. Step 2: Convert to fraction form
    76,387.49/105,415.85 = 42,398.15/x
  3. Step 3: Cross multiply
    76,387.49x = 105,415.85 × 42,398.15
  4. Step 4: Simplify right side
    76,387.49x = 4,469,437,390.21
  5. Step 5: Solve for x
    x = 4,469,437,390.21/76,387.49
  6. Step 6: Final answer
    x = 58,510.07

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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.