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Finding the Fourth Proportional to 316,949.94, 475,421.31 and 77,065.20

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Solution

The fourth proportional to 316,949.94, 475,421.31 and 77,065.20 is: 115,596.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,949.94 : 475,421.31 = 77,065.20 : x
  2. Step 2: Convert to fraction form
    316,949.94/475,421.31 = 77,065.20/x
  3. Step 3: Cross multiply
    316,949.94x = 475,421.31 × 77,065.20
  4. Step 4: Simplify right side
    316,949.94x = 36,638,438,339.41
  5. Step 5: Solve for x
    x = 36,638,438,339.41/316,949.94
  6. Step 6: Final answer
    x = 115,596.92

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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.