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Finding the Fourth Proportional to 66,750.42, 92,106.51 and 39,887.28

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Solution

The fourth proportional to 66,750.42, 92,106.51 and 39,887.28 is: 55,039.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,750.42 : 92,106.51 = 39,887.28 : x
  2. Step 2: Convert to fraction form
    66,750.42/92,106.51 = 39,887.28/x
  3. Step 3: Cross multiply
    66,750.42x = 92,106.51 × 39,887.28
  4. Step 4: Simplify right side
    66,750.42x = 3,673,878,154.19
  5. Step 5: Solve for x
    x = 3,673,878,154.19/66,750.42
  6. Step 6: Final answer
    x = 55,039.03

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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.