Home / 109,000.05-163,500.08-81,006.45

Finding the Fourth Proportional to 109,000.05, 163,500.08 and 81,006.45

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Solution

The fourth proportional to 109,000.05, 163,500.08 and 81,006.45 is: 121,509.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,000.05 : 163,500.08 = 81,006.45 : x
  2. Step 2: Convert to fraction form
    109,000.05/163,500.08 = 81,006.45/x
  3. Step 3: Cross multiply
    109,000.05x = 163,500.08 × 81,006.45
  4. Step 4: Simplify right side
    109,000.05x = 13,244,560,650.48
  5. Step 5: Solve for x
    x = 13,244,560,650.48/109,000.05
  6. Step 6: Final answer
    x = 121,509.68

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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.