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Finding the Fourth Proportional to 71,975.71, 99,326.85 and 39,711.45

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Solution

The fourth proportional to 71,975.71, 99,326.85 and 39,711.45 is: 54,802.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,975.71 : 99,326.85 = 39,711.45 : x
  2. Step 2: Convert to fraction form
    71,975.71/99,326.85 = 39,711.45/x
  3. Step 3: Cross multiply
    71,975.71x = 99,326.85 × 39,711.45
  4. Step 4: Simplify right side
    71,975.71x = 3,944,413,237.43
  5. Step 5: Solve for x
    x = 3,944,413,237.43/71,975.71
  6. Step 6: Final answer
    x = 54,802.01

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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.