Home / 105,379.77-145,427.16-57,636.35

Finding the Fourth Proportional to 105,379.77, 145,427.16 and 57,636.35

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Solution

The fourth proportional to 105,379.77, 145,427.16 and 57,636.35 is: 79,539.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,379.77 : 145,427.16 = 57,636.35 : x
  2. Step 2: Convert to fraction form
    105,379.77/145,427.16 = 57,636.35/x
  3. Step 3: Cross multiply
    105,379.77x = 145,427.16 × 57,636.35
  4. Step 4: Simplify right side
    105,379.77x = 8,381,890,693.27
  5. Step 5: Solve for x
    x = 8,381,890,693.27/105,379.77
  6. Step 6: Final answer
    x = 79,539.85

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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.