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Finding the Fourth Proportional to 118,205.88, 163,118.40 and 64,487.70

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Solution

The fourth proportional to 118,205.88, 163,118.40 and 64,487.70 is: 88,989.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,205.88 : 163,118.40 = 64,487.70 : x
  2. Step 2: Convert to fraction form
    118,205.88/163,118.40 = 64,487.70/x
  3. Step 3: Cross multiply
    118,205.88x = 163,118.40 × 64,487.70
  4. Step 4: Simplify right side
    118,205.88x = 10,519,130,443.68
  5. Step 5: Solve for x
    x = 10,519,130,443.68/118,205.88
  6. Step 6: Final answer
    x = 88,989.91

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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.