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Finding the Fourth Proportional to 101,438.80, 152,158.20 and 81,756.40

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Solution

The fourth proportional to 101,438.80, 152,158.20 and 81,756.40 is: 122,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,438.80 : 152,158.20 = 81,756.40 : x
  2. Step 2: Convert to fraction form
    101,438.80/152,158.20 = 81,756.40/x
  3. Step 3: Cross multiply
    101,438.80x = 152,158.20 × 81,756.40
  4. Step 4: Simplify right side
    101,438.80x = 12,439,906,662.48
  5. Step 5: Solve for x
    x = 12,439,906,662.48/101,438.80
  6. Step 6: Final answer
    x = 122,634.60

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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.