Home / 109,166.20-163,835.70-42,638.20

Finding the Fourth Proportional to 109,166.20, 163,835.70 and 42,638.20

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Solution

The fourth proportional to 109,166.20, 163,835.70 and 42,638.20 is: 63,991.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,166.20 : 163,835.70 = 42,638.20 : x
  2. Step 2: Convert to fraction form
    109,166.20/163,835.70 = 42,638.20/x
  3. Step 3: Cross multiply
    109,166.20x = 163,835.70 × 42,638.20
  4. Step 4: Simplify right side
    109,166.20x = 6,985,659,343.74
  5. Step 5: Solve for x
    x = 6,985,659,343.74/109,166.20
  6. Step 6: Final answer
    x = 63,991.05

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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.