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Finding the Fourth Proportional to 118,842.80, 164,003.06 and 65,129.06

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Solution

The fourth proportional to 118,842.80, 164,003.06 and 65,129.06 is: 89,878.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,842.80 : 164,003.06 = 65,129.06 : x
  2. Step 2: Convert to fraction form
    118,842.80/164,003.06 = 65,129.06/x
  3. Step 3: Cross multiply
    118,842.80x = 164,003.06 × 65,129.06
  4. Step 4: Simplify right side
    118,842.80x = 10,681,365,134.92
  5. Step 5: Solve for x
    x = 10,681,365,134.92/118,842.80
  6. Step 6: Final answer
    x = 89,878.10

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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.