Home / 90,860.58-136,307.88-28,516.50

Finding the Fourth Proportional to 90,860.58, 136,307.88 and 28,516.50

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Solution

The fourth proportional to 90,860.58, 136,307.88 and 28,516.50 is: 42,780.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,860.58 : 136,307.88 = 28,516.50 : x
  2. Step 2: Convert to fraction form
    90,860.58/136,307.88 = 28,516.50/x
  3. Step 3: Cross multiply
    90,860.58x = 136,307.88 × 28,516.50
  4. Step 4: Simplify right side
    90,860.58x = 3,887,023,660.02
  5. Step 5: Solve for x
    x = 3,887,023,660.02/90,860.58
  6. Step 6: Final answer
    x = 42,780.09

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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.