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Finding the Fourth Proportional to 163,711.80, 245,438.10 and 89,839.80

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Solution

The fourth proportional to 163,711.80, 245,438.10 and 89,839.80 is: 134,688.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,711.80 : 245,438.10 = 89,839.80 : x
  2. Step 2: Convert to fraction form
    163,711.80/245,438.10 = 89,839.80/x
  3. Step 3: Cross multiply
    163,711.80x = 245,438.10 × 89,839.80
  4. Step 4: Simplify right side
    163,711.80x = 22,050,109,816.38
  5. Step 5: Solve for x
    x = 22,050,109,816.38/163,711.80
  6. Step 6: Final answer
    x = 134,688.58

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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.