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Finding the Fourth Proportional to 118,543.72, 163,774.53 and 99,393.80

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Solution

The fourth proportional to 118,543.72, 163,774.53 and 99,393.80 is: 137,317.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,543.72 : 163,774.53 = 99,393.80 : x
  2. Step 2: Convert to fraction form
    118,543.72/163,774.53 = 99,393.80/x
  3. Step 3: Cross multiply
    118,543.72x = 163,774.53 × 99,393.80
  4. Step 4: Simplify right side
    118,543.72x = 16,278,173,355.00
  5. Step 5: Solve for x
    x = 16,278,173,355.00/118,543.72
  6. Step 6: Final answer
    x = 137,317.89

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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.