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Finding the Fourth Proportional to 211,866.55, 317,645.74 and 99,488.86

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Solution

The fourth proportional to 211,866.55, 317,645.74 and 99,488.86 is: 149,160.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,866.55 : 317,645.74 = 99,488.86 : x
  2. Step 2: Convert to fraction form
    211,866.55/317,645.74 = 99,488.86/x
  3. Step 3: Cross multiply
    211,866.55x = 317,645.74 × 99,488.86
  4. Step 4: Simplify right side
    211,866.55x = 31,602,211,886.70
  5. Step 5: Solve for x
    x = 31,602,211,886.70/211,866.55
  6. Step 6: Final answer
    x = 149,160.93

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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.