Home / 72,945.40-109,374.30-28,519.18

Finding the Fourth Proportional to 72,945.40, 109,374.30 and 28,519.18

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Solution

The fourth proportional to 72,945.40, 109,374.30 and 28,519.18 is: 42,761.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,945.40 : 109,374.30 = 28,519.18 : x
  2. Step 2: Convert to fraction form
    72,945.40/109,374.30 = 28,519.18/x
  3. Step 3: Cross multiply
    72,945.40x = 109,374.30 × 28,519.18
  4. Step 4: Simplify right side
    72,945.40x = 3,119,265,349.07
  5. Step 5: Solve for x
    x = 3,119,265,349.07/72,945.40
  6. Step 6: Final answer
    x = 42,761.65

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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.