Home / 90,627.10-135,940.65-38,139.10

Finding the Fourth Proportional to 90,627.10, 135,940.65 and 38,139.10

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Solution

The fourth proportional to 90,627.10, 135,940.65 and 38,139.10 is: 57,208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,627.10 : 135,940.65 = 38,139.10 : x
  2. Step 2: Convert to fraction form
    90,627.10/135,940.65 = 38,139.10/x
  3. Step 3: Cross multiply
    90,627.10x = 135,940.65 × 38,139.10
  4. Step 4: Simplify right side
    90,627.10x = 5,184,654,044.42
  5. Step 5: Solve for x
    x = 5,184,654,044.42/90,627.10
  6. Step 6: Final answer
    x = 57,208.65

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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.