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Finding the Fourth Proportional to 260,325.66, 390,042.72 and 142,079.98

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Solution

The fourth proportional to 260,325.66, 390,042.72 and 142,079.98 is: 212,876.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,325.66 : 390,042.72 = 142,079.98 : x
  2. Step 2: Convert to fraction form
    260,325.66/390,042.72 = 142,079.98/x
  3. Step 3: Cross multiply
    260,325.66x = 390,042.72 × 142,079.98
  4. Step 4: Simplify right side
    260,325.66x = 55,417,261,856.75
  5. Step 5: Solve for x
    x = 55,417,261,856.75/260,325.66
  6. Step 6: Final answer
    x = 212,876.68

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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.