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Finding the Fourth Proportional to 118,645.12, 163,748.64 and 67,657.96

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Solution

The fourth proportional to 118,645.12, 163,748.64 and 67,657.96 is: 93,378.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,645.12 : 163,748.64 = 67,657.96 : x
  2. Step 2: Convert to fraction form
    118,645.12/163,748.64 = 67,657.96/x
  3. Step 3: Cross multiply
    118,645.12x = 163,748.64 × 67,657.96
  4. Step 4: Simplify right side
    118,645.12x = 11,078,898,935.17
  5. Step 5: Solve for x
    x = 11,078,898,935.17/118,645.12
  6. Step 6: Final answer
    x = 93,378.46

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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.