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Finding the Fourth Proportional to 71,072.64, 98,080.80 and 39,242.40

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Solution

The fourth proportional to 71,072.64, 98,080.80 and 39,242.40 is: 54,154.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,072.64 : 98,080.80 = 39,242.40 : x
  2. Step 2: Convert to fraction form
    71,072.64/98,080.80 = 39,242.40/x
  3. Step 3: Cross multiply
    71,072.64x = 98,080.80 × 39,242.40
  4. Step 4: Simplify right side
    71,072.64x = 3,848,925,985.92
  5. Step 5: Solve for x
    x = 3,848,925,985.92/71,072.64
  6. Step 6: Final answer
    x = 54,154.82

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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.