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Finding the Fourth Proportional to 115,065.80, 158,709.01 and 76,806.06

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Solution

The fourth proportional to 115,065.80, 158,709.01 and 76,806.06 is: 105,937.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,065.80 : 158,709.01 = 76,806.06 : x
  2. Step 2: Convert to fraction form
    115,065.80/158,709.01 = 76,806.06/x
  3. Step 3: Cross multiply
    115,065.80x = 158,709.01 × 76,806.06
  4. Step 4: Simplify right side
    115,065.80x = 12,189,813,744.60
  5. Step 5: Solve for x
    x = 12,189,813,744.60/115,065.80
  6. Step 6: Final answer
    x = 105,937.77

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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.