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Finding the Fourth Proportional to 140,187.90, 210,330.45 and 61,358.70

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Solution

The fourth proportional to 140,187.90, 210,330.45 and 61,358.70 is: 92,059.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,187.90 : 210,330.45 = 61,358.70 : x
  2. Step 2: Convert to fraction form
    140,187.90/210,330.45 = 61,358.70/x
  3. Step 3: Cross multiply
    140,187.90x = 210,330.45 × 61,358.70
  4. Step 4: Simplify right side
    140,187.90x = 12,905,602,982.42
  5. Step 5: Solve for x
    x = 12,905,602,982.42/140,187.90
  6. Step 6: Final answer
    x = 92,059.32

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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.