Home / 90,869.63-136,326.51-28,540.13

Finding the Fourth Proportional to 90,869.63, 136,326.51 and 28,540.13

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Solution

The fourth proportional to 90,869.63, 136,326.51 and 28,540.13 is: 42,817.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,869.63 : 136,326.51 = 28,540.13 : x
  2. Step 2: Convert to fraction form
    90,869.63/136,326.51 = 28,540.13/x
  3. Step 3: Cross multiply
    90,869.63x = 136,326.51 × 28,540.13
  4. Step 4: Simplify right side
    90,869.63x = 3,890,775,636.21
  5. Step 5: Solve for x
    x = 3,890,775,636.21/90,869.63
  6. Step 6: Final answer
    x = 42,817.12

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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.