Home / 105,434.12-145,503.42-57,691.64

Finding the Fourth Proportional to 105,434.12, 145,503.42 and 57,691.64

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Solution

The fourth proportional to 105,434.12, 145,503.42 and 57,691.64 is: 79,616.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,434.12 : 145,503.42 = 57,691.64 : x
  2. Step 2: Convert to fraction form
    105,434.12/145,503.42 = 57,691.64/x
  3. Step 3: Cross multiply
    105,434.12x = 145,503.42 × 57,691.64
  4. Step 4: Simplify right side
    105,434.12x = 8,394,330,925.41
  5. Step 5: Solve for x
    x = 8,394,330,925.41/105,434.12
  6. Step 6: Final answer
    x = 79,616.83

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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.