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Finding the Fourth Proportional to 118,993.36, 163,895.52 and 88,681.72

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Solution

The fourth proportional to 118,993.36, 163,895.52 and 88,681.72 is: 122,145.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,993.36 : 163,895.52 = 88,681.72 : x
  2. Step 2: Convert to fraction form
    118,993.36/163,895.52 = 88,681.72/x
  3. Step 3: Cross multiply
    118,993.36x = 163,895.52 × 88,681.72
  4. Step 4: Simplify right side
    118,993.36x = 14,534,536,613.89
  5. Step 5: Solve for x
    x = 14,534,536,613.89/118,993.36
  6. Step 6: Final answer
    x = 122,145.78

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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.