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Finding the Fourth Proportional to 118,458.70, 163,420.52 and 70,684.43

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Solution

The fourth proportional to 118,458.70, 163,420.52 and 70,684.43 is: 97,513.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,458.70 : 163,420.52 = 70,684.43 : x
  2. Step 2: Convert to fraction form
    118,458.70/163,420.52 = 70,684.43/x
  3. Step 3: Cross multiply
    118,458.70x = 163,420.52 × 70,684.43
  4. Step 4: Simplify right side
    118,458.70x = 11,551,286,074.66
  5. Step 5: Solve for x
    x = 11,551,286,074.66/118,458.70
  6. Step 6: Final answer
    x = 97,513.19

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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.