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Finding the Fourth Proportional to 120,808.88, 180,399.76 and 98,666.20

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Solution

The fourth proportional to 120,808.88, 180,399.76 and 98,666.20 is: 147,334.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,808.88 : 180,399.76 = 98,666.20 : x
  2. Step 2: Convert to fraction form
    120,808.88/180,399.76 = 98,666.20/x
  3. Step 3: Cross multiply
    120,808.88x = 180,399.76 × 98,666.20
  4. Step 4: Simplify right side
    120,808.88x = 17,799,358,800.11
  5. Step 5: Solve for x
    x = 17,799,358,800.11/120,808.88
  6. Step 6: Final answer
    x = 147,334.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.