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Finding the Fourth Proportional to 260,180.40, 390,076.20 and 141,985.20

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Solution

The fourth proportional to 260,180.40, 390,076.20 and 141,985.20 is: 212,871.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,180.40 : 390,076.20 = 141,985.20 : x
  2. Step 2: Convert to fraction form
    260,180.40/390,076.20 = 141,985.20/x
  3. Step 3: Cross multiply
    260,180.40x = 390,076.20 × 141,985.20
  4. Step 4: Simplify right side
    260,180.40x = 55,385,047,272.24
  5. Step 5: Solve for x
    x = 55,385,047,272.24/260,180.40
  6. Step 6: Final answer
    x = 212,871.71

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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.