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Finding the Fourth Proportional to 251,390.79, 376,886.12 and 91,441.71

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Solution

The fourth proportional to 251,390.79, 376,886.12 and 91,441.71 is: 137,089.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,390.79 : 376,886.12 = 91,441.71 : x
  2. Step 2: Convert to fraction form
    251,390.79/376,886.12 = 91,441.71/x
  3. Step 3: Cross multiply
    251,390.79x = 376,886.12 × 91,441.71
  4. Step 4: Simplify right side
    251,390.79x = 34,463,110,830.86
  5. Step 5: Solve for x
    x = 34,463,110,830.86/251,390.79
  6. Step 6: Final answer
    x = 137,089.79

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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.