Home / 72,870.03-109,305.45-20,279.57

Finding the Fourth Proportional to 72,870.03, 109,305.45 and 20,279.57

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Solution

The fourth proportional to 72,870.03, 109,305.45 and 20,279.57 is: 30,419.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,870.03 : 109,305.45 = 20,279.57 : x
  2. Step 2: Convert to fraction form
    72,870.03/109,305.45 = 20,279.57/x
  3. Step 3: Cross multiply
    72,870.03x = 109,305.45 × 20,279.57
  4. Step 4: Simplify right side
    72,870.03x = 2,216,666,978.13
  5. Step 5: Solve for x
    x = 2,216,666,978.13/72,870.03
  6. Step 6: Final answer
    x = 30,419.46

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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.