Home / 90,539.20-135,272.84-87,438.52

Finding the Fourth Proportional to 90,539.20, 135,272.84 and 87,438.52

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Solution

The fourth proportional to 90,539.20, 135,272.84 and 87,438.52 is: 130,640.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,539.20 : 135,272.84 = 87,438.52 : x
  2. Step 2: Convert to fraction form
    90,539.20/135,272.84 = 87,438.52/x
  3. Step 3: Cross multiply
    90,539.20x = 135,272.84 × 87,438.52
  4. Step 4: Simplify right side
    90,539.20x = 11,828,056,925.80
  5. Step 5: Solve for x
    x = 11,828,056,925.80/90,539.20
  6. Step 6: Final answer
    x = 130,640.17

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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.