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Finding the Fourth Proportional to 64,969.59, 97,454.40 and 15,721.59

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Solution

The fourth proportional to 64,969.59, 97,454.40 and 15,721.59 is: 23,582.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,969.59 : 97,454.40 = 15,721.59 : x
  2. Step 2: Convert to fraction form
    64,969.59/97,454.40 = 15,721.59/x
  3. Step 3: Cross multiply
    64,969.59x = 97,454.40 × 15,721.59
  4. Step 4: Simplify right side
    64,969.59x = 1,532,138,120.50
  5. Step 5: Solve for x
    x = 1,532,138,120.50/64,969.59
  6. Step 6: Final answer
    x = 23,582.39

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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.