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Finding the Fourth Proportional to 66,408.90, 99,627.93 and 19,665.42

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Solution

The fourth proportional to 66,408.90, 99,627.93 and 19,665.42 is: 29,502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,408.90 : 99,627.93 = 19,665.42 : x
  2. Step 2: Convert to fraction form
    66,408.90/99,627.93 = 19,665.42/x
  3. Step 3: Cross multiply
    66,408.90x = 99,627.93 × 19,665.42
  4. Step 4: Simplify right side
    66,408.90x = 1,959,225,087.18
  5. Step 5: Solve for x
    x = 1,959,225,087.18/66,408.90
  6. Step 6: Final answer
    x = 29,502.45

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1.5x scale

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.