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Finding the Fourth Proportional to 81,903.15, 122,854.61 and 25,748.16

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Solution

The fourth proportional to 81,903.15, 122,854.61 and 25,748.16 is: 38,622.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,903.15 : 122,854.61 = 25,748.16 : x
  2. Step 2: Convert to fraction form
    81,903.15/122,854.61 = 25,748.16/x
  3. Step 3: Cross multiply
    81,903.15x = 122,854.61 × 25,748.16
  4. Step 4: Simplify right side
    81,903.15x = 3,163,280,535.26
  5. Step 5: Solve for x
    x = 3,163,280,535.26/81,903.15
  6. Step 6: Final answer
    x = 38,622.21

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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.