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Finding the Fourth Proportional to 78,815.44, 108,805.44 and 60,870.16

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Solution

The fourth proportional to 78,815.44, 108,805.44 and 60,870.16 is: 84,031.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,815.44 : 108,805.44 = 60,870.16 : x
  2. Step 2: Convert to fraction form
    78,815.44/108,805.44 = 60,870.16/x
  3. Step 3: Cross multiply
    78,815.44x = 108,805.44 × 60,870.16
  4. Step 4: Simplify right side
    78,815.44x = 6,623,004,541.67
  5. Step 5: Solve for x
    x = 6,623,004,541.67/78,815.44
  6. Step 6: Final answer
    x = 84,031.82

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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.