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Finding the Fourth Proportional to 64,642.95, 89,209.40 and 39,154.07

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Solution

The fourth proportional to 64,642.95, 89,209.40 and 39,154.07 is: 54,033.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,642.95 : 89,209.40 = 39,154.07 : x
  2. Step 2: Convert to fraction form
    64,642.95/89,209.40 = 39,154.07/x
  3. Step 3: Cross multiply
    64,642.95x = 89,209.40 × 39,154.07
  4. Step 4: Simplify right side
    64,642.95x = 3,492,910,450.44
  5. Step 5: Solve for x
    x = 3,492,910,450.44/64,642.95
  6. Step 6: Final answer
    x = 54,033.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.