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Finding the Fourth Proportional to 118,730.50, 163,848.09 and 68,432.74

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Solution

The fourth proportional to 118,730.50, 163,848.09 and 68,432.74 is: 94,437.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,730.50 : 163,848.09 = 68,432.74 : x
  2. Step 2: Convert to fraction form
    118,730.50/163,848.09 = 68,432.74/x
  3. Step 3: Cross multiply
    118,730.50x = 163,848.09 × 68,432.74
  4. Step 4: Simplify right side
    118,730.50x = 11,212,573,742.47
  5. Step 5: Solve for x
    x = 11,212,573,742.47/118,730.50
  6. Step 6: Final answer
    x = 94,437.18

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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.