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Finding the Fourth Proportional to 68,005.80, 93,821.13 and 39,320.21

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Solution

The fourth proportional to 68,005.80, 93,821.13 and 39,320.21 is: 54,246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,005.80 : 93,821.13 = 39,320.21 : x
  2. Step 2: Convert to fraction form
    68,005.80/93,821.13 = 39,320.21/x
  3. Step 3: Cross multiply
    68,005.80x = 93,821.13 × 39,320.21
  4. Step 4: Simplify right side
    68,005.80x = 3,689,066,534.04
  5. Step 5: Solve for x
    x = 3,689,066,534.04/68,005.80
  6. Step 6: Final answer
    x = 54,246.35

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1.5x scale

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.