Home / 78,937.09-117,829.81-68,972.47

Finding the Fourth Proportional to 78,937.09, 117,829.81 and 68,972.47

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Solution

The fourth proportional to 78,937.09, 117,829.81 and 68,972.47 is: 102,955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,937.09 : 117,829.81 = 68,972.47 : x
  2. Step 2: Convert to fraction form
    78,937.09/117,829.81 = 68,972.47/x
  3. Step 3: Cross multiply
    78,937.09x = 117,829.81 × 68,972.47
  4. Step 4: Simplify right side
    78,937.09x = 8,127,013,035.33
  5. Step 5: Solve for x
    x = 8,127,013,035.33/78,937.09
  6. Step 6: Final answer
    x = 102,955.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.