Home / 81,865.29-112,913.64-56,379.75

Finding the Fourth Proportional to 81,865.29, 112,913.64 and 56,379.75

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Solution

The fourth proportional to 81,865.29, 112,913.64 and 56,379.75 is: 77,762.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,865.29 : 112,913.64 = 56,379.75 : x
  2. Step 2: Convert to fraction form
    81,865.29/112,913.64 = 56,379.75/x
  3. Step 3: Cross multiply
    81,865.29x = 112,913.64 × 56,379.75
  4. Step 4: Simplify right side
    81,865.29x = 6,366,042,794.79
  5. Step 5: Solve for x
    x = 6,366,042,794.79/81,865.29
  6. Step 6: Final answer
    x = 77,762.42

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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.