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Finding the Fourth Proportional to 118,607, 163,716.54 and 85,170.20

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Solution

The fourth proportional to 118,607, 163,716.54 and 85,170.20 is: 117,562.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,607 : 163,716.54 = 85,170.20 : x
  2. Step 2: Convert to fraction form
    118,607/163,716.54 = 85,170.20/x
  3. Step 3: Cross multiply
    118,607x = 163,716.54 × 85,170.20
  4. Step 4: Simplify right side
    118,607x = 13,943,770,455.11
  5. Step 5: Solve for x
    x = 13,943,770,455.11/118,607
  6. Step 6: Final answer
    x = 117,562.80

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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.