Home / 105,535.09-145,638.65-57,137.52

Finding the Fourth Proportional to 105,535.09, 145,638.65 and 57,137.52

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Solution

The fourth proportional to 105,535.09, 145,638.65 and 57,137.52 is: 78,849.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,535.09 : 145,638.65 = 57,137.52 : x
  2. Step 2: Convert to fraction form
    105,535.09/145,638.65 = 57,137.52/x
  3. Step 3: Cross multiply
    105,535.09x = 145,638.65 × 57,137.52
  4. Step 4: Simplify right side
    105,535.09x = 8,321,430,991.46
  5. Step 5: Solve for x
    x = 8,321,430,991.46/105,535.09
  6. Step 6: Final answer
    x = 78,849.90

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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.