Home / 72,712.20-109,046.70-28,313.40

Finding the Fourth Proportional to 72,712.20, 109,046.70 and 28,313.40

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Solution

The fourth proportional to 72,712.20, 109,046.70 and 28,313.40 is: 42,461.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,712.20 : 109,046.70 = 28,313.40 : x
  2. Step 2: Convert to fraction form
    72,712.20/109,046.70 = 28,313.40/x
  3. Step 3: Cross multiply
    72,712.20x = 109,046.70 × 28,313.40
  4. Step 4: Simplify right side
    72,712.20x = 3,087,482,835.78
  5. Step 5: Solve for x
    x = 3,087,482,835.78/72,712.20
  6. Step 6: Final answer
    x = 42,461.69

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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.