Home / 109,378.80-164,068.20-90,716.40

Finding the Fourth Proportional to 109,378.80, 164,068.20 and 90,716.40

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Solution

The fourth proportional to 109,378.80, 164,068.20 and 90,716.40 is: 136,074.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,378.80 : 164,068.20 = 90,716.40 : x
  2. Step 2: Convert to fraction form
    109,378.80/164,068.20 = 90,716.40/x
  3. Step 3: Cross multiply
    109,378.80x = 164,068.20 × 90,716.40
  4. Step 4: Simplify right side
    109,378.80x = 14,883,676,458.48
  5. Step 5: Solve for x
    x = 14,883,676,458.48/109,378.80
  6. Step 6: Final answer
    x = 136,074.60

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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.