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Finding the Fourth Proportional to 118,354.28, 163,328.04 and 64,639.28

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Solution

The fourth proportional to 118,354.28, 163,328.04 and 64,639.28 is: 89,201.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,354.28 : 163,328.04 = 64,639.28 : x
  2. Step 2: Convert to fraction form
    118,354.28/163,328.04 = 64,639.28/x
  3. Step 3: Cross multiply
    118,354.28x = 163,328.04 × 64,639.28
  4. Step 4: Simplify right side
    118,354.28x = 10,557,406,909.41
  5. Step 5: Solve for x
    x = 10,557,406,909.41/118,354.28
  6. Step 6: Final answer
    x = 89,201.73

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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.