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Finding the Fourth Proportional to 78,666.52, 108,465.40 and 64,273

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Solution

The fourth proportional to 78,666.52, 108,465.40 and 64,273 is: 88,619.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,666.52 : 108,465.40 = 64,273 : x
  2. Step 2: Convert to fraction form
    78,666.52/108,465.40 = 64,273/x
  3. Step 3: Cross multiply
    78,666.52x = 108,465.40 × 64,273
  4. Step 4: Simplify right side
    78,666.52x = 6,971,396,654.20
  5. Step 5: Solve for x
    x = 6,971,396,654.20/78,666.52
  6. Step 6: Final answer
    x = 88,619.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.