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Finding the Fourth Proportional to 163,689, 245,532.80 and 45,360

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Solution

The fourth proportional to 163,689, 245,532.80 and 45,360 is: 68,039.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,689 : 245,532.80 = 45,360 : x
  2. Step 2: Convert to fraction form
    163,689/245,532.80 = 45,360/x
  3. Step 3: Cross multiply
    163,689x = 245,532.80 × 45,360
  4. Step 4: Simplify right side
    163,689x = 11,137,367,808
  5. Step 5: Solve for x
    x = 11,137,367,808/163,689
  6. Step 6: Final answer
    x = 68,039.81

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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.