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Finding the Fourth Proportional to 66,656.94, 91,977.66 and 42,815.94

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Solution

The fourth proportional to 66,656.94, 91,977.66 and 42,815.94 is: 59,080.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,656.94 : 91,977.66 = 42,815.94 : x
  2. Step 2: Convert to fraction form
    66,656.94/91,977.66 = 42,815.94/x
  3. Step 3: Cross multiply
    66,656.94x = 91,977.66 × 42,815.94
  4. Step 4: Simplify right side
    66,656.94x = 3,938,109,971.90
  5. Step 5: Solve for x
    x = 3,938,109,971.90/66,656.94
  6. Step 6: Final answer
    x = 59,080.27

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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.