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Finding the Fourth Proportional to 66,656.25, 99,988.02 and 19,912.77

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Solution

The fourth proportional to 66,656.25, 99,988.02 and 19,912.77 is: 29,870.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,656.25 : 99,988.02 = 19,912.77 : x
  2. Step 2: Convert to fraction form
    66,656.25/99,988.02 = 19,912.77/x
  3. Step 3: Cross multiply
    66,656.25x = 99,988.02 × 19,912.77
  4. Step 4: Simplify right side
    66,656.25x = 1,991,038,445.02
  5. Step 5: Solve for x
    x = 1,991,038,445.02/66,656.25
  6. Step 6: Final answer
    x = 29,870.24

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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.