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Finding the Fourth Proportional to 142,968.90, 214,454.90 and 43,129.96

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Solution

The fourth proportional to 142,968.90, 214,454.90 and 43,129.96 is: 64,695.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,968.90 : 214,454.90 = 43,129.96 : x
  2. Step 2: Convert to fraction form
    142,968.90/214,454.90 = 43,129.96/x
  3. Step 3: Cross multiply
    142,968.90x = 214,454.90 × 43,129.96
  4. Step 4: Simplify right side
    142,968.90x = 9,249,431,258.80
  5. Step 5: Solve for x
    x = 9,249,431,258.80/142,968.90
  6. Step 6: Final answer
    x = 64,695.41

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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.