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Finding the Fourth Proportional to 163,685.80, 245,399.10 and 89,813.80

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Solution

The fourth proportional to 163,685.80, 245,399.10 and 89,813.80 is: 134,649.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,685.80 : 245,399.10 = 89,813.80 : x
  2. Step 2: Convert to fraction form
    163,685.80/245,399.10 = 89,813.80/x
  3. Step 3: Cross multiply
    163,685.80x = 245,399.10 × 89,813.80
  4. Step 4: Simplify right side
    163,685.80x = 22,040,225,687.58
  5. Step 5: Solve for x
    x = 22,040,225,687.58/163,685.80
  6. Step 6: Final answer
    x = 134,649.59

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1.5x scale

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.