Home / 142,747.20-214,120.80-89,985.60

Finding the Fourth Proportional to 142,747.20, 214,120.80 and 89,985.60

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Solution

The fourth proportional to 142,747.20, 214,120.80 and 89,985.60 is: 134,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,747.20 : 214,120.80 = 89,985.60 : x
  2. Step 2: Convert to fraction form
    142,747.20/214,120.80 = 89,985.60/x
  3. Step 3: Cross multiply
    142,747.20x = 214,120.80 × 89,985.60
  4. Step 4: Simplify right side
    142,747.20x = 19,267,788,660.48
  5. Step 5: Solve for x
    x = 19,267,788,660.48/142,747.20
  6. Step 6: Final answer
    x = 134,978.40

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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.