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Finding the Fourth Proportional to 66,435.47, 91,629.06 and 42,564.41

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Solution

The fourth proportional to 66,435.47, 91,629.06 and 42,564.41 is: 58,705.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,435.47 : 91,629.06 = 42,564.41 : x
  2. Step 2: Convert to fraction form
    66,435.47/91,629.06 = 42,564.41/x
  3. Step 3: Cross multiply
    66,435.47x = 91,629.06 × 42,564.41
  4. Step 4: Simplify right side
    66,435.47x = 3,900,136,877.75
  5. Step 5: Solve for x
    x = 3,900,136,877.75/66,435.47
  6. Step 6: Final answer
    x = 58,705.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.