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Finding the Fourth Proportional to 207,214.80, 310,668.60 and 88,789.20

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Solution

The fourth proportional to 207,214.80, 310,668.60 and 88,789.20 is: 133,117.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,214.80 : 310,668.60 = 88,789.20 : x
  2. Step 2: Convert to fraction form
    207,214.80/310,668.60 = 88,789.20/x
  3. Step 3: Cross multiply
    207,214.80x = 310,668.60 × 88,789.20
  4. Step 4: Simplify right side
    207,214.80x = 27,584,016,459.12
  5. Step 5: Solve for x
    x = 27,584,016,459.12/207,214.80
  6. Step 6: Final answer
    x = 133,117.98

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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.