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Finding the Fourth Proportional to 105,186.60, 157,779.90 and 49,890.60

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Solution

The fourth proportional to 105,186.60, 157,779.90 and 49,890.60 is: 74,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,186.60 : 157,779.90 = 49,890.60 : x
  2. Step 2: Convert to fraction form
    105,186.60/157,779.90 = 49,890.60/x
  3. Step 3: Cross multiply
    105,186.60x = 157,779.90 × 49,890.60
  4. Step 4: Simplify right side
    105,186.60x = 7,871,733,878.94
  5. Step 5: Solve for x
    x = 7,871,733,878.94/105,186.60
  6. Step 6: Final answer
    x = 74,835.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.