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Finding the Fourth Proportional to 64,620.90, 96,931.51 and 19,642.67

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Solution

The fourth proportional to 64,620.90, 96,931.51 and 19,642.67 is: 29,464.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,620.90 : 96,931.51 = 19,642.67 : x
  2. Step 2: Convert to fraction form
    64,620.90/96,931.51 = 19,642.67/x
  3. Step 3: Cross multiply
    64,620.90x = 96,931.51 × 19,642.67
  4. Step 4: Simplify right side
    64,620.90x = 1,903,993,493.26
  5. Step 5: Solve for x
    x = 1,903,993,493.26/64,620.90
  6. Step 6: Final answer
    x = 29,464.05

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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.