Home / 109,637.20-164,520.60-79,980.40

Finding the Fourth Proportional to 109,637.20, 164,520.60 and 79,980.40

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Solution

The fourth proportional to 109,637.20, 164,520.60 and 79,980.40 is: 120,017.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,637.20 : 164,520.60 = 79,980.40 : x
  2. Step 2: Convert to fraction form
    109,637.20/164,520.60 = 79,980.40/x
  3. Step 3: Cross multiply
    109,637.20x = 164,520.60 × 79,980.40
  4. Step 4: Simplify right side
    109,637.20x = 13,158,423,396.24
  5. Step 5: Solve for x
    x = 13,158,423,396.24/109,637.20
  6. Step 6: Final answer
    x = 120,017.87

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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.