Home / 81,160.74-111,875.85-79,586.10

Finding the Fourth Proportional to 81,160.74, 111,875.85 and 79,586.10

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Solution

The fourth proportional to 81,160.74, 111,875.85 and 79,586.10 is: 109,705.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,160.74 : 111,875.85 = 79,586.10 : x
  2. Step 2: Convert to fraction form
    81,160.74/111,875.85 = 79,586.10/x
  3. Step 3: Cross multiply
    81,160.74x = 111,875.85 × 79,586.10
  4. Step 4: Simplify right side
    81,160.74x = 8,903,762,585.69
  5. Step 5: Solve for x
    x = 8,903,762,585.69/81,160.74
  6. Step 6: Final answer
    x = 109,705.29

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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.