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Finding the Fourth Proportional to 210,898.85, 316,339.05 and 61,135.88

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Solution

The fourth proportional to 210,898.85, 316,339.05 and 61,135.88 is: 91,701.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,898.85 : 316,339.05 = 61,135.88 : x
  2. Step 2: Convert to fraction form
    210,898.85/316,339.05 = 61,135.88/x
  3. Step 3: Cross multiply
    210,898.85x = 316,339.05 × 61,135.88
  4. Step 4: Simplify right side
    210,898.85x = 19,339,666,200.11
  5. Step 5: Solve for x
    x = 19,339,666,200.11/210,898.85
  6. Step 6: Final answer
    x = 91,701.15

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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.