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Finding the Fourth Proportional to 66,032.80, 99,064.56 and 21,656.80

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Solution

The fourth proportional to 66,032.80, 99,064.56 and 21,656.80 is: 32,490.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,032.80 : 99,064.56 = 21,656.80 : x
  2. Step 2: Convert to fraction form
    66,032.80/99,064.56 = 21,656.80/x
  3. Step 3: Cross multiply
    66,032.80x = 99,064.56 × 21,656.80
  4. Step 4: Simplify right side
    66,032.80x = 2,145,421,363.01
  5. Step 5: Solve for x
    x = 2,145,421,363.01/66,032.80
  6. Step 6: Final answer
    x = 32,490.24

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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.