Home / 142,739.20-214,108.80-89,977.60

Finding the Fourth Proportional to 142,739.20, 214,108.80 and 89,977.60

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Solution

The fourth proportional to 142,739.20, 214,108.80 and 89,977.60 is: 134,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,739.20 : 214,108.80 = 89,977.60 : x
  2. Step 2: Convert to fraction form
    142,739.20/214,108.80 = 89,977.60/x
  3. Step 3: Cross multiply
    142,739.20x = 214,108.80 × 89,977.60
  4. Step 4: Simplify right side
    142,739.20x = 19,264,995,962.88
  5. Step 5: Solve for x
    x = 19,264,995,962.88/142,739.20
  6. Step 6: Final answer
    x = 134,966.40

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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.