Home / 90,281.36-135,341.70-42,867.20

Finding the Fourth Proportional to 90,281.36, 135,341.70 and 42,867.20

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Solution

The fourth proportional to 90,281.36, 135,341.70 and 42,867.20 is: 64,262.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,281.36 : 135,341.70 = 42,867.20 : x
  2. Step 2: Convert to fraction form
    90,281.36/135,341.70 = 42,867.20/x
  3. Step 3: Cross multiply
    90,281.36x = 135,341.70 × 42,867.20
  4. Step 4: Simplify right side
    90,281.36x = 5,801,719,722.24
  5. Step 5: Solve for x
    x = 5,801,719,722.24/90,281.36
  6. Step 6: Final answer
    x = 64,262.65

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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.