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Finding the Fourth Proportional to 109,166.70, 163,836.45 and 42,638.70

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Solution

The fourth proportional to 109,166.70, 163,836.45 and 42,638.70 is: 63,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,166.70 : 163,836.45 = 42,638.70 : x
  2. Step 2: Convert to fraction form
    109,166.70/163,836.45 = 42,638.70/x
  3. Step 3: Cross multiply
    109,166.70x = 163,836.45 × 42,638.70
  4. Step 4: Simplify right side
    109,166.70x = 6,985,773,240.62
  5. Step 5: Solve for x
    x = 6,985,773,240.62/109,166.70
  6. Step 6: Final answer
    x = 63,991.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.