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Finding the Fourth Proportional to 118,411.68, 163,408.02 and 67,421.82

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Solution

The fourth proportional to 118,411.68, 163,408.02 and 67,421.82 is: 93,042.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,411.68 : 163,408.02 = 67,421.82 : x
  2. Step 2: Convert to fraction form
    118,411.68/163,408.02 = 67,421.82/x
  3. Step 3: Cross multiply
    118,411.68x = 163,408.02 × 67,421.82
  4. Step 4: Simplify right side
    118,411.68x = 11,017,266,111.00
  5. Step 5: Solve for x
    x = 11,017,266,111.00/118,411.68
  6. Step 6: Final answer
    x = 93,042.06

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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.