Home / 155,911.02-215,142.06-87,938.64

Finding the Fourth Proportional to 155,911.02, 215,142.06 and 87,938.64

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Solution

The fourth proportional to 155,911.02, 215,142.06 and 87,938.64 is: 121,346.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,911.02 : 215,142.06 = 87,938.64 : x
  2. Step 2: Convert to fraction form
    155,911.02/215,142.06 = 87,938.64/x
  3. Step 3: Cross multiply
    155,911.02x = 215,142.06 × 87,938.64
  4. Step 4: Simplify right side
    155,911.02x = 18,919,300,163.20
  5. Step 5: Solve for x
    x = 18,919,300,163.20/155,911.02
  6. Step 6: Final answer
    x = 121,346.78

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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.