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Finding the Fourth Proportional to 118,702.76, 163,810.29 and 64,992.78

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Solution

The fourth proportional to 118,702.76, 163,810.29 and 64,992.78 is: 89,690.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,702.76 : 163,810.29 = 64,992.78 : x
  2. Step 2: Convert to fraction form
    118,702.76/163,810.29 = 64,992.78/x
  3. Step 3: Cross multiply
    118,702.76x = 163,810.29 × 64,992.78
  4. Step 4: Simplify right side
    118,702.76x = 10,646,484,995.69
  5. Step 5: Solve for x
    x = 10,646,484,995.69/118,702.76
  6. Step 6: Final answer
    x = 89,690.29

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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.