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Finding the Fourth Proportional to 88,589.72, 122,154.50 and 72,406.80

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Solution

The fourth proportional to 88,589.72, 122,154.50 and 72,406.80 is: 99,840.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,589.72 : 122,154.50 = 72,406.80 : x
  2. Step 2: Convert to fraction form
    88,589.72/122,154.50 = 72,406.80/x
  3. Step 3: Cross multiply
    88,589.72x = 122,154.50 × 72,406.80
  4. Step 4: Simplify right side
    88,589.72x = 8,844,816,088.57
  5. Step 5: Solve for x
    x = 8,844,816,088.57/88,589.72
  6. Step 6: Final answer
    x = 99,840.21

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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.