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Finding the Fourth Proportional to 65,667.60, 98,534.40 and 30,128.88

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Solution

The fourth proportional to 65,667.60, 98,534.40 and 30,128.88 is: 45,208.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,667.60 : 98,534.40 = 30,128.88 : x
  2. Step 2: Convert to fraction form
    65,667.60/98,534.40 = 30,128.88/x
  3. Step 3: Cross multiply
    65,667.60x = 98,534.40 × 30,128.88
  4. Step 4: Simplify right side
    65,667.60x = 2,968,731,113.47
  5. Step 5: Solve for x
    x = 2,968,731,113.47/65,667.60
  6. Step 6: Final answer
    x = 45,208.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.