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Finding the Fourth Proportional to 210,953.90, 316,455.39 and 74,134.95

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Solution

The fourth proportional to 210,953.90, 316,455.39 and 74,134.95 is: 111,211.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,953.90 : 316,455.39 = 74,134.95 : x
  2. Step 2: Convert to fraction form
    210,953.90/316,455.39 = 74,134.95/x
  3. Step 3: Cross multiply
    210,953.90x = 316,455.39 × 74,134.95
  4. Step 4: Simplify right side
    210,953.90x = 23,460,404,514.88
  5. Step 5: Solve for x
    x = 23,460,404,514.88/210,953.90
  6. Step 6: Final answer
    x = 111,211.05

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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.