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Finding the Fourth Proportional to 64,920.49, 97,393.03 and 20,543.52

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Solution

The fourth proportional to 64,920.49, 97,393.03 and 20,543.52 is: 30,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,920.49 : 97,393.03 = 20,543.52 : x
  2. Step 2: Convert to fraction form
    64,920.49/97,393.03 = 20,543.52/x
  3. Step 3: Cross multiply
    64,920.49x = 97,393.03 × 20,543.52
  4. Step 4: Simplify right side
    64,920.49x = 2,000,795,659.67
  5. Step 5: Solve for x
    x = 2,000,795,659.67/64,920.49
  6. Step 6: Final answer
    x = 30,819.17

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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.