Home / 108,711.76-149,953.16-78,541.36

Finding the Fourth Proportional to 108,711.76, 149,953.16 and 78,541.36

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Solution

The fourth proportional to 108,711.76, 149,953.16 and 78,541.36 is: 108,337.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,711.76 : 149,953.16 = 78,541.36 : x
  2. Step 2: Convert to fraction form
    108,711.76/149,953.16 = 78,541.36/x
  3. Step 3: Cross multiply
    108,711.76x = 149,953.16 × 78,541.36
  4. Step 4: Simplify right side
    108,711.76x = 11,777,525,122.70
  5. Step 5: Solve for x
    x = 11,777,525,122.70/108,711.76
  6. Step 6: Final answer
    x = 108,337.18

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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.