Home / 109,325.20-163,987.80-72,000.40

Finding the Fourth Proportional to 109,325.20, 163,987.80 and 72,000.40

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Solution

The fourth proportional to 109,325.20, 163,987.80 and 72,000.40 is: 108,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,325.20 : 163,987.80 = 72,000.40 : x
  2. Step 2: Convert to fraction form
    109,325.20/163,987.80 = 72,000.40/x
  3. Step 3: Cross multiply
    109,325.20x = 163,987.80 × 72,000.40
  4. Step 4: Simplify right side
    109,325.20x = 11,807,187,195.12
  5. Step 5: Solve for x
    x = 11,807,187,195.12/109,325.20
  6. Step 6: Final answer
    x = 108,000.60

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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.