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Finding the Fourth Proportional to 210,691.62, 315,971.55 and 70,417.44

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Solution

The fourth proportional to 210,691.62, 315,971.55 and 70,417.44 is: 105,604.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,691.62 : 315,971.55 = 70,417.44 : x
  2. Step 2: Convert to fraction form
    210,691.62/315,971.55 = 70,417.44/x
  3. Step 3: Cross multiply
    210,691.62x = 315,971.55 × 70,417.44
  4. Step 4: Simplify right side
    210,691.62x = 22,249,907,663.83
  5. Step 5: Solve for x
    x = 22,249,907,663.83/210,691.62
  6. Step 6: Final answer
    x = 105,604.14

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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.