Home / 105,535.31-145,638.95-57,137.74

Finding the Fourth Proportional to 105,535.31, 145,638.95 and 57,137.74

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Solution

The fourth proportional to 105,535.31, 145,638.95 and 57,137.74 is: 78,850.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,535.31 : 145,638.95 = 57,137.74 : x
  2. Step 2: Convert to fraction form
    105,535.31/145,638.95 = 57,137.74/x
  3. Step 3: Cross multiply
    105,535.31x = 145,638.95 × 57,137.74
  4. Step 4: Simplify right side
    105,535.31x = 8,321,479,809.19
  5. Step 5: Solve for x
    x = 8,321,479,809.19/105,535.31
  6. Step 6: Final answer
    x = 78,850.20

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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.