Home / 90,820.20-136,214.10-57,480.60

Finding the Fourth Proportional to 90,820.20, 136,214.10 and 57,480.60

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Solution

The fourth proportional to 90,820.20, 136,214.10 and 57,480.60 is: 86,210.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,820.20 : 136,214.10 = 57,480.60 : x
  2. Step 2: Convert to fraction form
    90,820.20/136,214.10 = 57,480.60/x
  3. Step 3: Cross multiply
    90,820.20x = 136,214.10 × 57,480.60
  4. Step 4: Simplify right side
    90,820.20x = 7,829,668,196.46
  5. Step 5: Solve for x
    x = 7,829,668,196.46/90,820.20
  6. Step 6: Final answer
    x = 86,210.65

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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.