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Finding the Fourth Proportional to 260,000.20, 390,129.90 and 147,766.60

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Solution

The fourth proportional to 260,000.20, 390,129.90 and 147,766.60 is: 221,723.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,000.20 : 390,129.90 = 147,766.60 : x
  2. Step 2: Convert to fraction form
    260,000.20/390,129.90 = 147,766.60/x
  3. Step 3: Cross multiply
    260,000.20x = 390,129.90 × 147,766.60
  4. Step 4: Simplify right side
    260,000.20x = 57,648,168,881.34
  5. Step 5: Solve for x
    x = 57,648,168,881.34/260,000.20
  6. Step 6: Final answer
    x = 221,723.56

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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.