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Finding the Fourth Proportional to 116,509.92, 160,718.76 and 80,720.88

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Solution

The fourth proportional to 116,509.92, 160,718.76 and 80,720.88 is: 111,349.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,509.92 : 160,718.76 = 80,720.88 : x
  2. Step 2: Convert to fraction form
    116,509.92/160,718.76 = 80,720.88/x
  3. Step 3: Cross multiply
    116,509.92x = 160,718.76 × 80,720.88
  4. Step 4: Simplify right side
    116,509.92x = 12,973,359,739.71
  5. Step 5: Solve for x
    x = 12,973,359,739.71/116,509.92
  6. Step 6: Final answer
    x = 111,349.83

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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.