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Finding the Fourth Proportional to 137,148.30, 205,722.45 and 113,820.30

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Solution

The fourth proportional to 137,148.30, 205,722.45 and 113,820.30 is: 170,730.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,148.30 : 205,722.45 = 113,820.30 : x
  2. Step 2: Convert to fraction form
    137,148.30/205,722.45 = 113,820.30/x
  3. Step 3: Cross multiply
    137,148.30x = 205,722.45 × 113,820.30
  4. Step 4: Simplify right side
    137,148.30x = 23,415,390,975.74
  5. Step 5: Solve for x
    x = 23,415,390,975.74/137,148.30
  6. Step 6: Final answer
    x = 170,730.45

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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.