Home / 90,646.52-135,988.98-28,321.72

Finding the Fourth Proportional to 90,646.52, 135,988.98 and 28,321.72

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Solution

The fourth proportional to 90,646.52, 135,988.98 and 28,321.72 is: 42,488.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,646.52 : 135,988.98 = 28,321.72 : x
  2. Step 2: Convert to fraction form
    90,646.52/135,988.98 = 28,321.72/x
  3. Step 3: Cross multiply
    90,646.52x = 135,988.98 × 28,321.72
  4. Step 4: Simplify right side
    90,646.52x = 3,851,441,814.65
  5. Step 5: Solve for x
    x = 3,851,441,814.65/90,646.52
  6. Step 6: Final answer
    x = 42,488.58

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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.