Home / 90,923.10-135,771.20-74,316.54

Finding the Fourth Proportional to 90,923.10, 135,771.20 and 74,316.54

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Solution

The fourth proportional to 90,923.10, 135,771.20 and 74,316.54 is: 110,973.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,923.10 : 135,771.20 = 74,316.54 : x
  2. Step 2: Convert to fraction form
    90,923.10/135,771.20 = 74,316.54/x
  3. Step 3: Cross multiply
    90,923.10x = 135,771.20 × 74,316.54
  4. Step 4: Simplify right side
    90,923.10x = 10,090,045,444.07
  5. Step 5: Solve for x
    x = 10,090,045,444.07/90,923.10
  6. Step 6: Final answer
    x = 110,973.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.