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Finding the Fourth Proportional to 64,799.76, 96,980.16 and 39,855.63

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Solution

The fourth proportional to 64,799.76, 96,980.16 and 39,855.63 is: 59,648.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,799.76 : 96,980.16 = 39,855.63 : x
  2. Step 2: Convert to fraction form
    64,799.76/96,980.16 = 39,855.63/x
  3. Step 3: Cross multiply
    64,799.76x = 96,980.16 × 39,855.63
  4. Step 4: Simplify right side
    64,799.76x = 3,865,205,374.30
  5. Step 5: Solve for x
    x = 3,865,205,374.30/64,799.76
  6. Step 6: Final answer
    x = 59,648.45

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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.