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Finding the Fourth Proportional to 118,695.74, 163,800.11 and 64,980.59

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Solution

The fourth proportional to 118,695.74, 163,800.11 and 64,980.59 is: 89,673.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,695.74 : 163,800.11 = 64,980.59 : x
  2. Step 2: Convert to fraction form
    118,695.74/163,800.11 = 64,980.59/x
  3. Step 3: Cross multiply
    118,695.74x = 163,800.11 × 64,980.59
  4. Step 4: Simplify right side
    118,695.74x = 10,643,827,789.86
  5. Step 5: Solve for x
    x = 10,643,827,789.86/118,695.74
  6. Step 6: Final answer
    x = 89,673.21

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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.