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Finding the Fourth Proportional to 82,950.40, 124,425.60 and 20,620.90

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Solution

The fourth proportional to 82,950.40, 124,425.60 and 20,620.90 is: 30,931.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,950.40 : 124,425.60 = 20,620.90 : x
  2. Step 2: Convert to fraction form
    82,950.40/124,425.60 = 20,620.90/x
  3. Step 3: Cross multiply
    82,950.40x = 124,425.60 × 20,620.90
  4. Step 4: Simplify right side
    82,950.40x = 2,565,767,855.04
  5. Step 5: Solve for x
    x = 2,565,767,855.04/82,950.40
  6. Step 6: Final answer
    x = 30,931.35

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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.