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Finding the Fourth Proportional to 103,080.96, 142,190.64 and 65,289.60

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Solution

The fourth proportional to 103,080.96, 142,190.64 and 65,289.60 is: 90,060.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,080.96 : 142,190.64 = 65,289.60 : x
  2. Step 2: Convert to fraction form
    103,080.96/142,190.64 = 65,289.60/x
  3. Step 3: Cross multiply
    103,080.96x = 142,190.64 × 65,289.60
  4. Step 4: Simplify right side
    103,080.96x = 9,283,570,009.34
  5. Step 5: Solve for x
    x = 9,283,570,009.34/103,080.96
  6. Step 6: Final answer
    x = 90,060.96

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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.