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Finding the Fourth Proportional to 90,210.60, 135,315.90 and 43,554.60

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Solution

The fourth proportional to 90,210.60, 135,315.90 and 43,554.60 is: 65,331.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,210.60 : 135,315.90 = 43,554.60 : x
  2. Step 2: Convert to fraction form
    90,210.60/135,315.90 = 43,554.60/x
  3. Step 3: Cross multiply
    90,210.60x = 135,315.90 × 43,554.60
  4. Step 4: Simplify right side
    90,210.60x = 5,893,629,898.14
  5. Step 5: Solve for x
    x = 5,893,629,898.14/90,210.60
  6. Step 6: Final answer
    x = 65,331.90

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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.