Home / 90,815.40-136,244.76-28,485.84

Finding the Fourth Proportional to 90,815.40, 136,244.76 and 28,485.84

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Solution

The fourth proportional to 90,815.40, 136,244.76 and 28,485.84 is: 42,735.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,815.40 : 136,244.76 = 28,485.84 : x
  2. Step 2: Convert to fraction form
    90,815.40/136,244.76 = 28,485.84/x
  3. Step 3: Cross multiply
    90,815.40x = 136,244.76 × 28,485.84
  4. Step 4: Simplify right side
    90,815.40x = 3,881,046,434.20
  5. Step 5: Solve for x
    x = 3,881,046,434.20/90,815.40
  6. Step 6: Final answer
    x = 42,735.55

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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.