Home / 205,079.40-307,619.10-72,109.80

Finding the Fourth Proportional to 205,079.40, 307,619.10 and 72,109.80

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Solution

The fourth proportional to 205,079.40, 307,619.10 and 72,109.80 is: 108,164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,079.40 : 307,619.10 = 72,109.80 : x
  2. Step 2: Convert to fraction form
    205,079.40/307,619.10 = 72,109.80/x
  3. Step 3: Cross multiply
    205,079.40x = 307,619.10 × 72,109.80
  4. Step 4: Simplify right side
    205,079.40x = 22,182,351,777.18
  5. Step 5: Solve for x
    x = 22,182,351,777.18/205,079.40
  6. Step 6: Final answer
    x = 108,164.70

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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.