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Finding the Fourth Proportional to 118,699.92, 163,810.31 and 67,720.95

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Solution

The fourth proportional to 118,699.92, 163,810.31 and 67,720.95 is: 93,457.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,699.92 : 163,810.31 = 67,720.95 : x
  2. Step 2: Convert to fraction form
    118,699.92/163,810.31 = 67,720.95/x
  3. Step 3: Cross multiply
    118,699.92x = 163,810.31 × 67,720.95
  4. Step 4: Simplify right side
    118,699.92x = 11,093,389,812.99
  5. Step 5: Solve for x
    x = 11,093,389,812.99/118,699.92
  6. Step 6: Final answer
    x = 93,457.43

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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.