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Finding the Fourth Proportional to 84,000.20, 125,870.70 and 72,854.60

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Solution

The fourth proportional to 84,000.20, 125,870.70 and 72,854.60 is: 109,169.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,000.20 : 125,870.70 = 72,854.60 : x
  2. Step 2: Convert to fraction form
    84,000.20/125,870.70 = 72,854.60/x
  3. Step 3: Cross multiply
    84,000.20x = 125,870.70 × 72,854.60
  4. Step 4: Simplify right side
    84,000.20x = 9,170,259,500.22
  5. Step 5: Solve for x
    x = 9,170,259,500.22/84,000.20
  6. Step 6: Final answer
    x = 109,169.50

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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.