Home / 90,666.40-135,999.60-57,278.20

Finding the Fourth Proportional to 90,666.40, 135,999.60 and 57,278.20

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Solution

The fourth proportional to 90,666.40, 135,999.60 and 57,278.20 is: 85,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,666.40 : 135,999.60 = 57,278.20 : x
  2. Step 2: Convert to fraction form
    90,666.40/135,999.60 = 57,278.20/x
  3. Step 3: Cross multiply
    90,666.40x = 135,999.60 × 57,278.20
  4. Step 4: Simplify right side
    90,666.40x = 7,789,812,288.72
  5. Step 5: Solve for x
    x = 7,789,812,288.72/90,666.40
  6. Step 6: Final answer
    x = 85,917.30

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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.