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Finding the Fourth Proportional to 118,833.28, 163,990.32 and 65,118.88

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Solution

The fourth proportional to 118,833.28, 163,990.32 and 65,118.88 is: 89,864.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,833.28 : 163,990.32 = 65,118.88 : x
  2. Step 2: Convert to fraction form
    118,833.28/163,990.32 = 65,118.88/x
  3. Step 3: Cross multiply
    118,833.28x = 163,990.32 × 65,118.88
  4. Step 4: Simplify right side
    118,833.28x = 10,678,865,969.24
  5. Step 5: Solve for x
    x = 10,678,865,969.24/118,833.28
  6. Step 6: Final answer
    x = 89,864.27

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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.