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Finding the Fourth Proportional to 120,868.60, 181,130.10 and 89,030.20

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Solution

The fourth proportional to 120,868.60, 181,130.10 and 89,030.20 is: 133,418.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,868.60 : 181,130.10 = 89,030.20 : x
  2. Step 2: Convert to fraction form
    120,868.60/181,130.10 = 89,030.20/x
  3. Step 3: Cross multiply
    120,868.60x = 181,130.10 × 89,030.20
  4. Step 4: Simplify right side
    120,868.60x = 16,126,049,029.02
  5. Step 5: Solve for x
    x = 16,126,049,029.02/120,868.60
  6. Step 6: Final answer
    x = 133,418.02

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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.