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Finding the Fourth Proportional to 76,539.94, 105,588.32 and 65,911.12

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Solution

The fourth proportional to 76,539.94, 105,588.32 and 65,911.12 is: 90,925.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,539.94 : 105,588.32 = 65,911.12 : x
  2. Step 2: Convert to fraction form
    76,539.94/105,588.32 = 65,911.12/x
  3. Step 3: Cross multiply
    76,539.94x = 105,588.32 × 65,911.12
  4. Step 4: Simplify right side
    76,539.94x = 6,959,444,430.12
  5. Step 5: Solve for x
    x = 6,959,444,430.12/76,539.94
  6. Step 6: Final answer
    x = 90,925.66

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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.