Home / 105,537.80-145,640.18-57,790.28

Finding the Fourth Proportional to 105,537.80, 145,640.18 and 57,790.28

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Solution

The fourth proportional to 105,537.80, 145,640.18 and 57,790.28 is: 79,749.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,537.80 : 145,640.18 = 57,790.28 : x
  2. Step 2: Convert to fraction form
    105,537.80/145,640.18 = 57,790.28/x
  3. Step 3: Cross multiply
    105,537.80x = 145,640.18 × 57,790.28
  4. Step 4: Simplify right side
    105,537.80x = 8,416,586,781.45
  5. Step 5: Solve for x
    x = 8,416,586,781.45/105,537.80
  6. Step 6: Final answer
    x = 79,749.50

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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.