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Finding the Fourth Proportional to 211,030.60, 316,545.90 and 61,270.60

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Solution

The fourth proportional to 211,030.60, 316,545.90 and 61,270.60 is: 91,905.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,030.60 : 316,545.90 = 61,270.60 : x
  2. Step 2: Convert to fraction form
    211,030.60/316,545.90 = 61,270.60/x
  3. Step 3: Cross multiply
    211,030.60x = 316,545.90 × 61,270.60
  4. Step 4: Simplify right side
    211,030.60x = 19,394,957,220.54
  5. Step 5: Solve for x
    x = 19,394,957,220.54/211,030.60
  6. Step 6: Final answer
    x = 91,905.90

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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.