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Finding the Fourth Proportional to 72,660.80, 100,281.30 and 40,829.70

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Solution

The fourth proportional to 72,660.80, 100,281.30 and 40,829.70 is: 56,350.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,660.80 : 100,281.30 = 40,829.70 : x
  2. Step 2: Convert to fraction form
    72,660.80/100,281.30 = 40,829.70/x
  3. Step 3: Cross multiply
    72,660.80x = 100,281.30 × 40,829.70
  4. Step 4: Simplify right side
    72,660.80x = 4,094,454,800.14
  5. Step 5: Solve for x
    x = 4,094,454,800.14/72,660.80
  6. Step 6: Final answer
    x = 56,350.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.