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Finding the Fourth Proportional to 193,701.78, 290,530.80 and 67,320.72

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Solution

The fourth proportional to 193,701.78, 290,530.80 and 67,320.72 is: 100,973.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,701.78 : 290,530.80 = 67,320.72 : x
  2. Step 2: Convert to fraction form
    193,701.78/290,530.80 = 67,320.72/x
  3. Step 3: Cross multiply
    193,701.78x = 290,530.80 × 67,320.72
  4. Step 4: Simplify right side
    193,701.78x = 19,558,742,638.18
  5. Step 5: Solve for x
    x = 19,558,742,638.18/193,701.78
  6. Step 6: Final answer
    x = 100,973.48

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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.