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Finding the Fourth Proportional to 118,830.56, 163,987.81 and 65,114.60

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Solution

The fourth proportional to 118,830.56, 163,987.81 and 65,114.60 is: 89,859.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,830.56 : 163,987.81 = 65,114.60 : x
  2. Step 2: Convert to fraction form
    118,830.56/163,987.81 = 65,114.60/x
  3. Step 3: Cross multiply
    118,830.56x = 163,987.81 × 65,114.60
  4. Step 4: Simplify right side
    118,830.56x = 10,677,999,670.30
  5. Step 5: Solve for x
    x = 10,677,999,670.30/118,830.56
  6. Step 6: Final answer
    x = 89,859.04

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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.