Home / 105,438.40-145,504.81-57,691.93

Finding the Fourth Proportional to 105,438.40, 145,504.81 and 57,691.93

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Solution

The fourth proportional to 105,438.40, 145,504.81 and 57,691.93 is: 79,614.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,438.40 : 145,504.81 = 57,691.93 : x
  2. Step 2: Convert to fraction form
    105,438.40/145,504.81 = 57,691.93/x
  3. Step 3: Cross multiply
    105,438.40x = 145,504.81 × 57,691.93
  4. Step 4: Simplify right side
    105,438.40x = 8,394,453,313.18
  5. Step 5: Solve for x
    x = 8,394,453,313.18/105,438.40
  6. Step 6: Final answer
    x = 79,614.76

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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.