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Finding the Fourth Proportional to 118,369.98, 163,348.80 and 64,653.90

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Solution

The fourth proportional to 118,369.98, 163,348.80 and 64,653.90 is: 89,221.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,369.98 : 163,348.80 = 64,653.90 : x
  2. Step 2: Convert to fraction form
    118,369.98/163,348.80 = 64,653.90/x
  3. Step 3: Cross multiply
    118,369.98x = 163,348.80 × 64,653.90
  4. Step 4: Simplify right side
    118,369.98x = 10,561,136,980.32
  5. Step 5: Solve for x
    x = 10,561,136,980.32/118,369.98
  6. Step 6: Final answer
    x = 89,221.41

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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.