Home / 78,988.05-109,005.60-47,175.30

Finding the Fourth Proportional to 78,988.05, 109,005.60 and 47,175.30

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Solution

The fourth proportional to 78,988.05, 109,005.60 and 47,175.30 is: 65,103.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.05 : 109,005.60 = 47,175.30 : x
  2. Step 2: Convert to fraction form
    78,988.05/109,005.60 = 47,175.30/x
  3. Step 3: Cross multiply
    78,988.05x = 109,005.60 × 47,175.30
  4. Step 4: Simplify right side
    78,988.05x = 5,142,371,881.68
  5. Step 5: Solve for x
    x = 5,142,371,881.68/78,988.05
  6. Step 6: Final answer
    x = 65,103.16

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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.