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Finding the Fourth Proportional to 109,520.80, 164,050.80 and 91,088.80

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Solution

The fourth proportional to 109,520.80, 164,050.80 and 91,088.80 is: 136,441.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,520.80 : 164,050.80 = 91,088.80 : x
  2. Step 2: Convert to fraction form
    109,520.80/164,050.80 = 91,088.80/x
  3. Step 3: Cross multiply
    109,520.80x = 164,050.80 × 91,088.80
  4. Step 4: Simplify right side
    109,520.80x = 14,943,190,511.04
  5. Step 5: Solve for x
    x = 14,943,190,511.04/109,520.80
  6. Step 6: Final answer
    x = 136,441.58

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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.