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Finding the Fourth Proportional to 71,800.29, 99,081.73 and 39,968.51

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Solution

The fourth proportional to 71,800.29, 99,081.73 and 39,968.51 is: 55,155.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,800.29 : 99,081.73 = 39,968.51 : x
  2. Step 2: Convert to fraction form
    71,800.29/99,081.73 = 39,968.51/x
  3. Step 3: Cross multiply
    71,800.29x = 99,081.73 × 39,968.51
  4. Step 4: Simplify right side
    71,800.29x = 3,960,148,421.07
  5. Step 5: Solve for x
    x = 3,960,148,421.07/71,800.29
  6. Step 6: Final answer
    x = 55,155.05

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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.