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Finding the Fourth Proportional to 64,354.53, 96,530.76 and 19,981.33

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Solution

The fourth proportional to 64,354.53, 96,530.76 and 19,981.33 is: 29,971.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,354.53 : 96,530.76 = 19,981.33 : x
  2. Step 2: Convert to fraction form
    64,354.53/96,530.76 = 19,981.33/x
  3. Step 3: Cross multiply
    64,354.53x = 96,530.76 × 19,981.33
  4. Step 4: Simplify right side
    64,354.53x = 1,928,812,646.19
  5. Step 5: Solve for x
    x = 1,928,812,646.19/64,354.53
  6. Step 6: Final answer
    x = 29,971.67

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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.