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Finding the Fourth Proportional to 86,813.79, 119,762.53 and 56,196.78

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Solution

The fourth proportional to 86,813.79, 119,762.53 and 56,196.78 is: 77,525.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,813.79 : 119,762.53 = 56,196.78 : x
  2. Step 2: Convert to fraction form
    86,813.79/119,762.53 = 56,196.78/x
  3. Step 3: Cross multiply
    86,813.79x = 119,762.53 × 56,196.78
  4. Step 4: Simplify right side
    86,813.79x = 6,730,268,550.65
  5. Step 5: Solve for x
    x = 6,730,268,550.65/86,813.79
  6. Step 6: Final answer
    x = 77,525.34

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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.