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Finding the Fourth Proportional to 64,303.62, 96,420.20 and 19,918.05

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Solution

The fourth proportional to 64,303.62, 96,420.20 and 19,918.05 is: 29,866.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,303.62 : 96,420.20 = 19,918.05 : x
  2. Step 2: Convert to fraction form
    64,303.62/96,420.20 = 19,918.05/x
  3. Step 3: Cross multiply
    64,303.62x = 96,420.20 × 19,918.05
  4. Step 4: Simplify right side
    64,303.62x = 1,920,502,265.02
  5. Step 5: Solve for x
    x = 1,920,502,265.02/64,303.62
  6. Step 6: Final answer
    x = 29,866.16

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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.