Home / 86,989.28-120,103.02-66,810.09

Finding the Fourth Proportional to 86,989.28, 120,103.02 and 66,810.09

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Solution

The fourth proportional to 86,989.28, 120,103.02 and 66,810.09 is: 92,242.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,989.28 : 120,103.02 = 66,810.09 : x
  2. Step 2: Convert to fraction form
    86,989.28/120,103.02 = 66,810.09/x
  3. Step 3: Cross multiply
    86,989.28x = 120,103.02 × 66,810.09
  4. Step 4: Simplify right side
    86,989.28x = 8,024,094,025.86
  5. Step 5: Solve for x
    x = 8,024,094,025.86/86,989.28
  6. Step 6: Final answer
    x = 92,242.34

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1.5x scale

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.