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Finding the Fourth Proportional to 120,200.90, 180,301.35 and 64,904.90

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Solution

The fourth proportional to 120,200.90, 180,301.35 and 64,904.90 is: 97,357.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,200.90 : 180,301.35 = 64,904.90 : x
  2. Step 2: Convert to fraction form
    120,200.90/180,301.35 = 64,904.90/x
  3. Step 3: Cross multiply
    120,200.90x = 180,301.35 × 64,904.90
  4. Step 4: Simplify right side
    120,200.90x = 11,702,441,091.62
  5. Step 5: Solve for x
    x = 11,702,441,091.62/120,200.90
  6. Step 6: Final answer
    x = 97,357.35

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1.5x scale

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.