Home / 78,972.10-108,946.45-47,122.49

Finding the Fourth Proportional to 78,972.10, 108,946.45 and 47,122.49

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Solution

The fourth proportional to 78,972.10, 108,946.45 and 47,122.49 is: 65,008.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,972.10 : 108,946.45 = 47,122.49 : x
  2. Step 2: Convert to fraction form
    78,972.10/108,946.45 = 47,122.49/x
  3. Step 3: Cross multiply
    78,972.10x = 108,946.45 × 47,122.49
  4. Step 4: Simplify right side
    78,972.10x = 5,133,828,000.66
  5. Step 5: Solve for x
    x = 5,133,828,000.66/78,972.10
  6. Step 6: Final answer
    x = 65,008.12

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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.